That's great, right? Not so fast: the same report also points out that, despite this increased interest, consumers find the buzzing and sometimes obscure world of climate beneficial food puzzling. From complex labels to opaque sourcing and unclear carbon impact, 6 in 10 consumers say it is hard to know if the food choices they make are environmentally sustainable; of those, 63% say it would have a greater influence on their choices if it were easier. There are even examples of people sharing their frustration.
From food and beverage companies to universities and non-profits, the sustainable food development and communication industry is experiencing a real boost but has a long way to go before making the transition to a more sustainable diet seamless for consumers. Here's some inspiration for consumers looking to make the change:
Ready to Eat and Drink
If you want to introduce more climate-beneficial food into your diet but don't have time to go to the farmer's market every week or to cook your own food on a daily basis, a first positive step could be turning to sustainable snacks that are ready to eat or drink and can perfectly fit into your busy everyday schedule.
Some brands' ingredients come from a fully traceable network involving verified regenerative agriculture farmers who have built soil health into their cultivation methods. Look for snack providers who are investing in recyclable packaging, carbon offsetting and a shortened supply chain, so as to reduce the impact of transportation while keeping ingredients fresh and preserving their flavour, to explore all the climate benefits of these products.
Climate-beneficial foods can also give food waste products a new lease of life. Avocado seeds, for example, have been used to brew a drink rich in antioxidants and low in calories unlocking access to a nutrition source that has so far remained unexplored.
Simple Ingredients
If you feel a bit bolder and want to give a sustainable shift to your cooking, why not add some unusual ingredients to your diet? This category includes both new and innovative options that have started making their way to the global market only recently; and options that have been part of our culinary tradition for ages but partially forgotten due to the cannibalization of their market share by more popular ingredients.
- Algae: combining their carbon-negative profile with sustainable sourcing, algae have the potential to change the food system for the better while being good for your health, thanks to their essential fatty acids and high vitamin and antioxidants content. Although may not appeal to the most squeamish consumers, algae actually possess a meat-like, umami flavour that makes them an ideal replacement for meat. They can also be dried and minced to obtain healthy salt-like condiments and dressings.
- Cacti: many varieties of cacti are edible and contain high amounts of vitamins C and E, carotenoids, fibre and amino acids. Cacti stems have long been part of the Mexican culinary tradition and are now starting to enter the international market through new, delicious concepts.
- Uncommon grains: if you don't feel like revolutionizing your diet with unusual ingredients, you can opt for a more gradual change by diversifying your sources of carbohydrates. Despite the existence of 21 different families of grains, at the moment rice, wheat and maize make up more than 50% of global cereal consumption. Opting for diverse grain varieties (like amaranth, fonio or buckwheat) will not only provide you with more nutritional value, but also help improve soil health and preserve biodiversity.
As a general reference, you can find lots of inspiring ingredients and ideas in the Future 50 Foods report.
Processed Ingredients
It may be hard to believe, but processed foods can be just as climate-beneficial as unprocessed ones. Feeling sceptical? What began as an internal initiative of beer giant ABInbev to reduce its waste is now a fully independent company turning beer-production by-products into nutritious and versatile flours. Can you imagine making delicious pasta, cookies or bread with something that, until yesterday, was destined for the bin?
Elsewhere, climate-beneficial foods are reducing food waste by making use of products that would otherwise not make it to the market because of their appearance or size. This is how green banana powder is produced, for example. It combines the textural properties of starch and the nutritional benefits of bananas. It's tasteless and can be used as a substitute for traditional flour for healthier and gluten-free solutions or as a clean-label binding agent in place of chemicals. It's also great for adding texture and prebiotic fibre to a recipe.
There are plenty of climate-beneficial food options already on the market with more and more are expected in the near future. The next steps to make the most of such an endless potential lie in initiatives aimed at increasing education on the topic among final consumers, as well as in building more structured supply chains so as to make it easier for producers to get access to the above-mentioned ingredients.
Although it's easy to feel overwhelmed by the amount or lack of information, it's important not to let yourself be discouraged: a better future for humans and the planet is just a forkful away.
Reposted with permission from the World Economic Forum.
- Climate-friendly Food Is Easier Than We Think | World Resources ... ›
- Eating Locally and in Season: Is It Really Better for the Environment ... ›
If you make a purchase using the links included, we may earn commission.
Factors That Influence How Many Solar Panels You Need
To determine how many solar panels are needed to power a house, several factors must be considered. For example, if there are two identical homes powered by solar energy in California and New York, with exactly the same energy usage, the California home will need fewer solar panels because the state gets more sunshine.
The following are some of the most important factors to consider when figuring out many solar panels you need:
Size of Your Home and Available Roof Space
Larger homes tend to consume more electricity, and they generally need more solar panels. However, they also have the extra roof space necessary for larger solar panel installations. There may be exceptions to this rule — for example, a 2,000-square-foot home with new Energy Star appliances may consume less power than a 1,200-square-foot home with older, less-efficient devices.
When it comes to installation, solar panels can be placed on many types of surfaces. However, your roof conditions may limit the number of solar panels your home can handle.
For example, if you have a chimney, rooftop air conditioning unit or skylight, you'll have to place panels around these fixtures. Similarly, roof areas that are covered by shadows are not suitable for panels. Also, most top solar companies will not work on asbestos roofs due to the potential health risks for installers.
Amount of Direct Sunlight in Your Area
Where there is more sunlight available, there is more energy that can be converted into electricity. The yearly output of each solar panel is higher in states like Arizona or New Mexico, which get a larger amount of sunlight than less sunny regions like New England.
The World Bank has created solar radiation maps for over 200 countries and regions, including the U.S. The map below can give you an idea of the sunshine available in your location. Keep in mind that homes in sunnier regions will generally need fewer solar panels.
© 2020 The World Bank, Source: Global Solar Atlas 2.0, Solar resource data: Solargis.
Number of Residents and Amount of Energy You Use
Households with more members normally use a higher amount of electricity, and this also means they need more solar panels to increase energy production.
Electricity usage is a very important factor, as it determines how much power must be generated by your solar panel system. If your home uses 12,000 kilowatt-hours (kWh) per year and you want to go 100% solar, your system must be capable of generating that amount of power.
Type of Solar Panel and Efficiency Rating
High-efficiency panels can deliver more watts per square foot, which means you need to purchase fewer of them to reach your electricity generation target. There are three main types of solar panels: monocrystalline, polycrystalline and thin-film. In general, monocrystalline panels are the most efficient solar panels, followed closely by polycrystalline panels. Thin-film panels are the least efficient.
How to Estimate the Number of Solar Panels You Need
So, based on these factors, how many solar panels power a home? To roughly determine how many solar panels you need without a professional assessment, you'll need to figure out two basic things: how much energy you use and how much energy your panels will produce.
According to the latest data from the U.S. Energy Information Administration (EIA), the average American home uses 10,649 kWh of energy per year. However, this varies depending on the state. For example:
- Louisiana homes have the highest average consumption, at 14,787 kWh per year.
- Hawaii homes have the lowest average consumption, at 6,298 kWh per year.
To more closely estimate how much energy you use annually, add up the kWh reported on your last 12 power bills. These numbers will fluctuate based on factors like the size of your home, the number of residents, your electricity consumption habits and the energy efficiency rating of your home devices.
Solar Panel Specific Yield
After you determine how many kWh of electricity your home uses annually, you'll want to figure out how many kWh are produced by each of your solar panels during a year. This will depend on the specific type of solar panel, roof conditions and local peak sunlight hours.
In the solar power industry, a common metric used to estimate system capacity is "specific yield" or "specific production." This can be defined as the annual kWh of energy produced for each kilowatt of solar capacity installed. Specific yield has much to do with the amount of sunlight available in your location.
You can get a better idea of the specific yield that can be achieved in your location by checking reliable sources like the World Bank solar maps or the solar radiation database from the National Renewable Energy Laboratory.
To estimate how many kW are needed to run a house, you can divide your annual kWh consumption by the specific yield per kilowatt of solar capacity. For example, if your home needs 15,000 kWh of energy per year, and solar panels have a specific yield of 1,500 kW/kW in your location, you will need a system size of around 10 kilowatts.
Paradise Energy Solutions has also come up with a general formula to roughly ballpark the solar panel system size you need. You can simply divide your annual kWh by 1,200 and you will get the kilowatts of solar capacity needed. So, if the energy consumption reported on your last 12 power bills adds up to 24,000 kWh, you'll need a 20 kW system (24,000 / 1,200 = 20).
So, How Many Solar Panels Do I Need?
Once you know the system size you need, you can check your panel wattage to figure how many panels to purchase for your solar array. Multiply your system size by 1,000 to obtain watts, then divide this by the individual wattage of each solar panel.
Most of the best solar panels on the market have an output of around 330W to 360W each. The output of less efficient panels can be as low as 250W.
So, if you need a 10-kW solar installation and you're buying solar panels that have an output of 340W, you'll need 30 panels. Your formula will look like this: 10,000W / 340W = 29.4 panels.
If you use lower-efficiency 250-watt solar panels, you'll need 40 of them (10,000W / 250W = 40) panels.
Keep in mind that, although the cost of solar panels is lower if you choose a lower-efficiency model over a pricier high-efficiency one, the total amount you pay for your solar energy system may come out to be the same or higher because you'll have to buy more panels.
How Much Roof Space Do You Need for a Home Solar System?
After you estimate how many solar panels power a house, the next step is calculating the roof area needed for their installation. The exact dimensions may change slightly depending on the manufacturer, but a typical solar panel for residential use measures 65 inches by 39 inches, or 17.6 square feet. You will need 528 square feet of roof space to install 30 panels, and 704 square feet to install 40.
In addition to having the required space for solar panels, you'll also need a roof structure that supports their weight. A home solar panel weighs around 20 kilograms (44 pounds), which means that 30 of them will add around 600 kilograms (1,323 pounds) to your roof.
You will notice that some solar panels are described as residential, while others are described as commercial. Residential panels have 60 individual solar cells, while commercial panels have 72 cells, but both types will work in any building. Here are a few key differences:
- Commercial solar panels produce around 20% more energy, thanks to their extra cells.
- Commercial panels are also more expensive, as well as 20% larger and heavier.
- Residential 60-cell solar panels are easier to handle in home installations, which saves on labor, and their smaller size helps when roof dimensions are limited.
Some of the latest solar panel designs have half-cells with a higher efficiency, which means they have 120 cells instead of 60 (or 144 instead of 72). However, this doesn't change the dimensions of the panels.
Conclusion: Are Solar Panels Worth it for Your Home?
Solar panels produce no carbon emissions while operating. However, the EIA estimates fossil fuels still produce around 60% of the electricity delivered by U.S. power grids.
Although the initial investment in solar panels is steep, renewable energy systems make sense financially for many homeowners. According to the Department of Energy, they have a typical payback period of about 10 years, while their rated service life is up to 30 years. After recovering your initial investment, you will have a source of clean and free electricity for about two decades.
Plus, even if you have a large home or find you need more solar panels than you initially thought you would, keep in mind that there are both federal and local tax credits, rebates and other incentives to help you save on your solar power system.
To get a free, no-obligation quote and see how much a solar panel system would cost for your home, fill out the 30-second form below.
The coral reefs in Florida are in trouble. With the climate crisis, warming and acidifying ocean waters, poor water quality and a rampant, mystery coral disease, the reefs in the Southern United States have been in sharp decline. They're in such an unhealthy state that even grazing by sea snails, which occurs naturally, are adding undue stress to corals and becoming a serious issue.
The snail, Coralliophila galea, is an "inconspicuous" predator that hides on the underside of coral structures during the day and emerges at night to feed on sessile coral prey that are unable to evade them, said Casey B. Butler, Research Associate with the Fish and Wildlife Research Institute (FWRI), which is a part of the Florida Fish and Wildlife Conservation Commission (FWC).
The corallivorous snail, Coralliophila galea. These snails were partially eaten by lobsters. FWC / FWRI
"Our coral reefs in Florida and throughout the Caribbean have been hit with an onslaught of stressors, such as poor water quality, rampant coral disease outbreaks, coral bleaching, and damage from direct human impacts," Butler told EcoWatch. "Though often overlooked because it is a natural stressor, predation of corals by animals like snails and other organisms is nonetheless important and one of the greatest contributors to the death of small coral outplants."
Outplants are nursery-raised, transplanted corals being used to restore degraded parts of Florida's reefs, said Michelle Ashton, a representative of Fish and Wildlife Foundation of Florida (FWFF). They're grown and planted with the hope that they will persist and reproduce naturally to help restore the reefs. With the survival of coral reefs in question, restoration efforts are critical to fight for their future.
Controlling the snails is particularly important around outplants, Ashton added. Butler explained why: newly-outplanted corals are particularly vulnerable to predation by snails and other animals because they are typically small and planted in areas lacking coral abundance. The gastropods can consume young corals before they even have a chance to grow or reproduce to restore the reefs.
"Even though these snails are small in size, they can demolish the small coral outplants," Butler said. If outplants die, it can frustrate coral restoration efforts.
To combat this, FWFF funded a study with FWC to determine if transplanting spotted spiny lobsters at coral restoration sites is an effective way to control the snails. The lobsters are found naturally on Florida's reefs and are known to eat sea snails. One full-grown lobster can consume several snails a day.
A spotted lobster. FWC / FWRI
"Restoration practitioners often try to remove as many of these snails at restoration sites when they can, but the aim of this current project to harness the marine food web by employing lobsters that will eat those corallivorous snails and keep the snail populations, and thus the mortality of the coral outplants, at bay," Butler said.
FWC scientists will collect and study wild spotted spiny lobsters to determine "who's eating who, Butler explained. They will look to see how many snails lobsters are eating, if they're eating anything else (such as "good" animals that keep algal growth down) and the resulting health of the reefs. If high levels of coral predators in the lobsters' guts results in healthy reefs, the lobsters could be deployed during the next phase of the study at reef outplantings to help protect young corals. If spotted lobsters are eating more good grazers than predatory snails, they could be removed from coral restoration sites, instead.
Butler noted that FWC does not intend to grow spotted lobsters for transplanting, instead moving them from other non-reef areas to bolster populations at restoration sites for the study.
This is a novel form of "biological control" that hopes to "harness the trophic cascade" that naturally exists on reefs between corals, predatory snails and lobsters. Restoration practitioners could potentially employ these techniques to keep coral predation down and to facilitate outplant survivorship not only on Florida's reefs but across the Caribbean where spiny lobsters are naturally found, Ashton said.
With the future of coral reefs in question, further scientific efforts like these will be critical to bolster coral restoration efforts and outcomes.
Elkhorn corals are amongst those being outplanted in Florida to restore the reef. David Gross / Ocean Image Bank
- Reducing Our Emissions Is the 'Only Hope' for Coral Reefs, Study ... ›
- Coral in Crisis: Can Replanting Efforts Halt Reefs' Death Spiral ... ›
- Coral Rescue Team Races to Save Endangered Corals From ... ›
Conservationists have actually been working hard to keep the California condor (Gymnogyps californianus) alive with captive breeding and reintroduction efforts. "They would be extinct without conservation by now," Claudia Hermes, a Red List researcher at BirdLife International who has worked on the California condor listing, told Mongabay. "But with conservation, they actually respond fairly well."
Now, a new addition to the IUCN's Red List — the IUCN Green Status of Species — illustrates the condor's positive response to conservation efforts, despite its critically endangered status, and its high recovery potential if these efforts are maintained.
"The Green Status really fills this gap because it tells us that despite the fairly high extinction risk that we still have this hope," Hermes said.
The preliminary green status for the California condor (Gymnogyps californianus). IUCN
A new paper published July 28 in Conservation Biology introduces the IUCN Green Status as a new assessment framework that provides information about the ecological functionality of a species within its range, and also how much a species has recovered due to conservation efforts. A team of more than 200 international scientists from 171 institutions presented preliminary Green Status assessments for 181 species, ranging from the pink pigeon (Nesoenas mayeri) to the gray wolf (Canis lupus) to the Sumatran rhinoceros (Dicerorhinus sumatrensis).
"It's providing a more nuanced picture of what's going on with a species and that's going to provide information that's really important for conservation planning and also measuring and celebrating the impact of past conservation," lead author Molly Grace, a researcher at the University of Oxford who led the development of the IUCN Green Status, told Mongabay. "The Red List is a wonderful tool, but when we try to use it beyond what it was made to do, which is to measure extinction risk, then we sometimes get answers that are a bit misleading or don't tell the full story."
The IUCN Green Status will classify species into nine recovery categories that will use historical population levels to indicate if a species has been largely depleted from its range or if it is nearing recovery. The assessment framework will also measure the impact of past conservation efforts, species' reliance on conservation action, and how much a species could gain in the next 10 years due to conservation action. It also offers a long-term view of species' recovery potential over the next 100 years.
A pink pigeon (Nesoenas mayeri) photographed in its native Mauritius. Sergey Yeliseev / Flickr
Sometimes a species' Red List status will align with the Green Status, but other times the two metrics will not match up. Take the burrowing bettong (Bettongia lesueur), a small marsupial, for example. The species' Red List status is "near threatened," which suggests that while the species is in peril there isn't an immediate risk of extinction. But the Green Status shows that the burrowing bettong is actually "critically depleted" from its range and does not have a high recovery potential due to the difficulties in controlling invasive species like cats and foxes that prey upon these animals.
Less than 2% of the surveyed species had a conservation impact metric of zero, which indicates "that conservation has, or will, play a role in improving or maintaining species status for the vast majority of these species," the authors write in the paper.
Co-author Elizabeth Bennett, vice president for species conservation at the Wildlife Conservation Society (WCS), says the new framework can help incentivize conservation action.
"There are... donors that are starting to be interested in this because it's more fine-tuned and sensitive to change than the Red List," Bennett told Mongabay. "So within a granting period, you potentially could improve the green status of a species, where the Red List status tends to be much slower to react to change."
Burrowing bettong (Bettongia lesueur), a near threatened species that is critically depleted from its native range in Australia. Daniele Parra / Flickr
The IUCN Green Status will be officially launched online at the start of the IUCN World Conservation Congress, which will take place in Marseille, France, from Sept. 3-11, 2021.
"The core thing that excites me is that it's an optimistic view of where we want to go with species conservation," Bennett told Mongabay. "And it gives people a really good clear roadmap about that for each species. So instead of just saying, Oh, we don't want this species to go extinct… we can say, but we want it to be thriving, and we want to be playing its full ecological role. And this is what it could look like. And this is how we can get there."
Reposted with permission from Mongabay.
- Giant Pandas No Longer Endangered Thanks to Conservation ... ›
- Red Kites Are Thriving in UK Thanks to Conservation Effort - EcoWatch ›
- Fireflies Face Extinction From Habitat Loss, Light Pollution and ... ›
As much of the world was living under coronavirus lockdowns in 2020, last year's Overshoot Day fell on August 22, nearly a month later than the high of July 25 set in 2018. But this year, even though carbon emissions from air travel and road transport are still lagging 2019 highs, a rallying global economy is pushing emissions and consumption back up.
"Rather than recognize this as a reset moment, governments have been eager to get back to business-as-usual. Global emissions are already creeping back up to pre-pandemic levels," said Stephanie Feldstein, population and sustainability director at the Center for Biological Diversity (CBD), a US-based environmental group.
In an email to DW, she pointed out that even with last year's shutdowns, greenhouse gases only declined 6.4% in 2020 — a substantial drop representing around twice Japan's yearly emissions, but not enough to turn things around.
"We missed opportunities when bailout funds were given to major climate polluters, like the aviation and meat industries, without any requirements for a green recovery," said Feldstein. "And we continue to miss opportunities every day that officials refuse to recognize the climate and extinction crises as emergencies — just like the pandemic."
Balancing the Books
Earth Overshoot Day, first created in 2006, aims to calculate the number of days per year that correspond to the necessary biocapacity — the ability of an ecosystem to reestablish its biological resources and absorb waste — to account for civilization's ecological footprint.
Global Footprint Network (GFN), the research organization which comes up with the yearly date along with environmental group WWF, compares the calculation to a bank statement tracking income against expenditures. It crunches thousands of UN data points on resources like biologically productive forests, grazing lands, cropland, fishing grounds and urban areas. That tally is then measured against the demand for those natural resources, among them plant-based foods, timber, livestock, fish and the capacity of forests to absorb carbon dioxide emissions.
Today, humanity uses about 74% more than what global ecosystems can regenerate; to continue living the way we do now, we'd need the resources of about 1.7 Earths. And that doesn't look set to change any time soon. CO2 emissions related to energy — particularly fossil fuels like coal — are projected to grow by 4.8% this year over 2020 levels, according to the International Energy Agency.
Boosting the Bioeconomy
Feldstein, however, sees some reasons to be optimistic. "The most hopeful signs are coming from communities around the world that are taking the climate crisis seriously, rethinking consumption and growth, and integrating equity and environmental protection into their policies," she said.
Among them are communities looking to tap into the bioeconomy, which aims to swap a "bio-based, or renewables-based, economy for the fossil fuels-based economy" while addressing societal challenges, as outlined in a December 2019 report by the Stockholm Environment Institute (SEI).
Rocio A. Diaz-Chavez, the deputy center director at SEI Africa in Nairobi, Kenya and the report's author, said making the shift to a bioeconomy can help preserve natural resources for future generations while working to create sustainable industries today. She highlighted regional groups like the UN's Economic Commission for Latin America and the Caribbean or BioInnovate Africa in Kenya — organizations which are working to promote bioeconomy and sustainable development in their parts of the world.
Diaz-Chavez told DW that the pandemic recovery could be the opportunity for these regions to explore alternatives to the traditional economy that would "contribute to job creation and improve livelihoods, [while] producing alternatives to fossil fuel products."
One example: reducing the Global South's reliance on fossil-fuel derived pesticides and fertilizers shipped in from abroad, in favor of locally produced biofertilizers. "This would have a series of contributions to human health, and to the environment," she said, adding that this shift could also help develop alternative supply chains for other sustainable products.
She stressed, however, that the development of the bioeconomy hinged on having the necessary infrastructure or improved supply chains in place to support and market such products, especially in sub-Saharan Africa.
Solutions to #MoveTheDate
Greening our economies isn't the only way to bring us back into balance with the Earth. On its site under the rallying cry #MoveTheDate, the Global Footprint Network (GFN) highlights other ways to bring that date closer to December 31.
Reforesting an area the size of India, for example, would shift the date back by eight days, according to GFN. Retrofitting buildings and industries with existing energy-saving technology, such as mechanical system upgrades, water conservation controls and sensors that accurately control lighting, temperature and air quality, would move the date back by 21 days.
Food is another important area — according to GFN, half of the Earth's biocapacity is used just to keep us fed. But too much of that food is lost due to inefficiencies during the production process, or waste; an estimated 30 to 40% of food in the US ends up in landfills every year.
By eliminating food loss and waste, reducing meat consumption and choosing foods grown with more sustainable agricultural practices less reliant on fossil fuels, another month could be added to the Earth's biocapacity account. Shifting to more plant-based diets, for example, could help reduce food-related emissions as much as 70% by 2050, according to a recent draft report released by the Intergovernmental Panel on Climate Change.
"While we need to transition away from industrial agriculture as a whole, we can't solve this problem by simply tweaking how food is produced — we must change what is produced," said the CBD's Feldstein, adding that while fossil fuels are responsible for more emissions overall, meat and dairy production are also a major cause of habitat loss. "Governments can accelerate this change by supporting plant-centered diets and agriculture and ending subsidies for cheap meat and dairy."
Reposted with permission from Deutsch Welle.