Electric Vehicles Vs. Hybrids: The Face-off For Distance, Efficiency and Reliability
By Josh Goldman
Choosing a vehicle is tough.
Sunroof or moonroof?
Front wheel drive, rear wheel drive, or all-wheel drive? Do I even need a CD player? And what about color? Burnt orange is nice, but so is cashmere metallic and squid ink (hint: always get squid ink). Considering a hybrid or electric vehicle adds another factor into an already difficult decision. Should you go with a standard hybrid, plug-in hybrid, battery electric or fuel cell? What is the difference between these types of vehicles anyway?
Conventional hybrids, like the Toyota Prius, combine both a gasoline engine with an electric motor. While these vehicles have an electric motor and battery, they can’t be plugged in and recharged. Instead their batteries are charged from capturing energy when braking, using regenerative braking that converts kinetic energy into electricity. This energy is normally wasted in conventional vehicles.
Depending on the type of hybrid, the electric motor will work with the gasoline-powered engine to reduce gasoline use or even allow the gasoline engine to turn off altogether. Hybrid fuel-saving technologies can dramatically increase fuel economy. For example, the 2014 Honda Accord hybrid achieves a combined 47 miles per gallon (mpg) compared to a combined 30 mpg for the non-hybrid version. At 12,000 miles a year and $4 per gallon of gasoline, that means saving over $575 each year.
Plug-In Hybrid Electric Vehicles (PHEVs)
Plug-in hybrid electric vehicles (PHEVs) are similar to conventional hybrids in that they have both an electric motor and internal combustion engine, except PHEV batteries can be charged by plugging into an outlet. So why opt for a PHEV instead of a conventional hybrid? Well, unlike conventional hybrids, PHEVs can substitute electricity from the grid for gasoline. The 2014 Ford Fusion Energi, for example, can go about 21 miles by only using electricity, and the 2014 Chevy Volt can go around 38 miles before the gasoline motor kicks in.
Though this doesn’t sound like a far ways, many people drive less than this distance each day. In a recent Union of Concerned Scientists (UCS) survey, 54 percent of respondents reported driving less than 40 miles a day. Moreover, using electricity instead of gasoline is cheaper and cleaner for most people. The average cost to drive 100 miles on electricity is only $3.45 compared to $13.52 for driving 100 miles on gasoline.
Battery Electric Vehicles (BEVs)
Battery electric vehicles run exclusively on electricity via on-board batteries that are charged by plugging into an outlet or charging station. The Nissan LEAF, Fiat 500e, and Tesla Model S fall into this category, though there are many other BEVs on the market. These vehicles have no gasoline engine, longer electric driving ranges compared to PHEVs, and never produce tailpipe emissions (though there are emissions associated with charging these vehicles, which UCS has previously examined).
The BEVs on the market today generally go around 60 to 80 miles per charge, though a Tesla can travel over 200 miles on a single charge. A recent UCS survey found that a BEV range of 60 miles would fit the weekday driving needs of 69 percent of U.S. drivers. As battery technology continues to improve, BEV ranges will extend even further, offering an even larger number of drivers the option of driving exclusively on electricity.
Fuel Cell Electric Vehicles (FCEVs)
Fuel Cell Electric Vehicles (FCEV) use an electric-only motor like a BEV, but stores energy quite a bit differently. Instead of recharging a battery, FCEVs store hydrogen gas in a tank. The fuel cell in FCEVs combines hydrogen with oxygen from the air to produce electricity. The electricity from the fuel cell then powers an electric motor, which powers the vehicle just like a BEV. And like BEVs, there is no smog-forming or climate-changing pollution from FCEVs tailpipe – the only byproduct is water. Unlike BEVs or PHEVs, however, there is no need to plug-in FCEVs, since their fuel cells are recharged by refilling with hydrogen, which can take as little as 5 minutes at a filling station.
But just as producing electricity to charge a plug-in vehicle creates emissions, producing hydrogen also generates emissions. Hydrogen made today from natural gas produces about the same total emissions per mile as charging a plug-in vehicle with electricity generated from natural gas. But when made from renewable sources like biomass or solar power, hydrogen can be nearly emission free.
Moreover, hydrogen fueling infrastructure, like public electric vehicle charging stations, is still ramping up—and mostly available in California. With increased state and federal policies aimed at helping get more of these vehicles on the road, FCEVs can become a large part of our future transportation systems.
Visit EcoWatch’s TRANSPORTATION page for more related news on this topic.
By Robert J. Orth, Jonathan Lefcheck and Karen McGlathery
A century ago Virginia's coastal lagoons were a natural paradise. Fishing boats bobbed on the waves as geese flocked overhead. Beneath the surface, miles of seagrass gently swayed in the surf, making the seabed look like a vast underwater prairie.
Why Didn’t Seagrasses Recover Naturally?<p>Development, nutrient runoff and other human impacts have damaged marshes, mangroves, coral reefs and seagrasses in many bays and estuaries worldwide. Loss or shrinkage of these key habitats has reduced commercial fisheries, increased erosion, made coastlines more vulnerable to floods and storms and harmed many types of aquatic life. Rapid climate change has compounded these effects through <a href="https://theconversation.com/ocean-warming-has-fisheries-on-the-move-helping-some-but-hurting-more-116248" target="_blank">rising global temperatures</a>, more <a href="https://theconversation.com/more-frequent-and-intense-tropical-storms-mean-less-recovery-time-for-the-worlds-coastlines-123335" target="_blank">frequent and severe storms</a> and <a href="https://theconversation.com/as-climate-change-alters-the-oceans-what-will-happen-to-dungeness-crabs-61501" target="_blank">ocean acidification</a>.</p><p>In the late 1990s, local residents told two of us who are longtime students of seagrasses (Robert "JJ" Orth and Karen McGlathery) that they had spotted small patches of eelgrass in shallow waters off Virginia's eastern shore. For years the conventional view had been that seagrasses in this area had not recovered from the events of the 1930s because human activities had <a href="https://doi.org/10.1016/j.aquabot.2005.07.007" target="_blank">made the area inhospitable for them</a>.</p><p>But studies showed that water quality in these coastal bays was <a href="https://doi.org/10.1007/BF02782971" target="_blank" rel="noopener noreferrer">comparatively good</a>. This led us to explore a different explanation: Seeds from healthy seagrass populations elsewhere along the Atlantic coast simply weren't reaching these isolated bays. Seagrasses are underwater flowering plants, so seeds are among the main ways they reproduce and spread to new environments.</p>
Eelgrass beds were restored in four bays at the southern tip of Virginia's eastern shore on the Atlantic coast. David J. Wilcox/VIMS, CC BY-ND
Sowing a New Crop<p>From our <a href="https://doi.org/10.2307/1941597" target="_blank">earlier research</a>, we knew that when eelgrass seeds fall from the parent plant, they sink to the sea bottom quickly and don't move far from where they land. We also knew that these seeds don't germinate until late fall or early winter. This meant that if we collected the seeds in spring, when eelgrass flowers, we could hold them until the fall, helping them survive over the months in between.</p><p>We decided to try reseeding eelgrass in the areas where they were missing. Starting in 1999, we collected seeds by hand from underwater meadows in nearby Chesapeake Bay – plucking the long reproductive shoots, bringing them back to our laboratory and holding them in large outdoor seawater tanks until they released their seeds naturally. After about 10 years we started gathering the grasses using a custom-built underwater "lawn mower" to collect many more of the reproductive shoots than we could by hand.</p><p>In 2001 we sowed our first round by simply tossing seeds from a boat. Our first test plots covered 28 acres of mud flats in waters 2 to 3 feet deep. Returning the following year, we saw new seedlings sprouting up.</p><p>Each year since then, the <a href="https://www.vims.edu/" target="_blank">Virginia Institute of Marine Science</a> and the <a href="https://www.nature.org/en-us/about-us/where-we-work/united-states/virginia/" target="_blank" rel="noopener noreferrer">Nature Conservancy's Virginia Coast Reserve</a>, along with staff and students from the <a href="https://www.vcrlter.virginia.edu/" target="_blank" rel="noopener noreferrer">University of Virginia</a>, have led a team of scientists and citizens to collect and seed a combined 536 acres of bare bottom in several coastal bays.</p><p>These initial plots took off and rapidly expanded. By 2020 they covered 9,600 acres across four bays. Several factors helped them flourish. These bays are naturally flushed with cool, clean water from the Atlantic Ocean. And they lie off the tip of Virginia's eastern shore, where there is little coastal development.</p>
<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="a482c2146febd6782c99960c2b55feb8"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/K9NyfPLINtk?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Sheltering Marine Life and Storing Carbon<p>Since eelgrass disappeared from these bays in the 1930s, human understanding of seagrass ecosystems has evolved. Today people don't pack their walls full of seagrass insulation but instead value different services they provide, such as habitat for fish and shellfish – including many <a href="https://doi.org/10.1111/conl.12645" target="_blank" rel="noopener noreferrer">commercially and recreationally important species</a>.</p><p>Scientists and government agencies also have recognized the importance of coastal systems in capturing and storing so-called "<a href="https://oceanservice.noaa.gov/facts/bluecarbon.html" target="_blank" rel="noopener noreferrer">blue carbon</a>." In fact, we now know that seagrasses constitute a globally significant <a href="https://doi.org/10.1038/ngeo1477" target="_blank" rel="noopener noreferrer">carbon sink</a>. They are a key tool for reducing carbon dioxide in the atmosphere and <a href="https://doi.org/10.1038/s41598-020-64094-1" target="_blank" rel="noopener noreferrer">slowing climate change</a></p><p>We are working to understand the valuable services that our restored seagrass beds provide. To our surprise, fish and invertebrates returned within only a few years as the meadows expanded. These organisms have established extensive food webs that include species ranging from tiny seahorses to 6-foot-long sandbar sharks.<br></p><p>Other benefits were equally dramatic. Water in the bays become clearer as the seagrass canopy trapped floating particles and deposited them onto the bottom, burying significant stocks of carbon and nitrogen in sediments bound by the grasses' roots. Our research is the first to verify the overall net carbon captured by seagrass, and is now being used to issue carbon offset credits that in turn <a href="https://vaseagrant.org/eelgrass-carbon-credits/" target="_blank">create more funds for restoration</a>.</p><p>One big question was whether restoring seagrasses could make it possible to bring back bay scallops, which once generated millions of dollars for the local economy. Since bay scallops no longer existed in Virginia, we obtained broodstock from North Carolina, which we have <a href="https://chesapeakebaymagazine.com/return-of-the-bay-scallop/" target="_blank">reared and released annually</a> since 2013. Regular surveys now reveal a growing population of bay scallops in the restored eelgrass, although there is still some way to go before they reach levels seen in the 1930s.</p>
Restored seagrass beds (dark areas) along Virginia's Atlantic coast, with sunlight reflecting from a small island. Jonathan Lefcheck, CC BY-ND
A Model for Coastal Restoration<p>Repairing damaged ecosystems is such an urgent mission worldwide that the United Nations has designated 2021-2030 as the <a href="https://www.decadeonrestoration.org/" target="_blank">U.N. Decade on Ecosystem Restoration</a>. We see the success we have achieved with eelgrass restoration as a prime model for similar efforts in coastal areas around the world.</p><p>Our project focused not only on reviving this essential habitat, but also on charting how restoring seagrasses affected the ecosystem and on the co-restoration of bay scallops. It provides a road map for involving scholars, nonprofits organizations, citizens and government agencies in an ecological mission where they can see the results of their work.</p><p>Recent assessments show that the restored zone only covers about 30% of the total habitable bottom in our project area. With continued support, eelgrass – and the many benefits it provides – may continue to thrive and expand well into the 21st century.</p>
EcoWatch Daily Newsletter
By Jessica Corbett
Leaders of climate and conservation groups on Tuesday welcomed House Democrats' introduction of landmark legislation that aims to address the ocean impacts of human-caused global heating and reform federal ocean management—recognizing that, as Rep. Raúl M. Grijalva put it, "a healthy ocean is key to fighting the climate crisis."
<div id="a858f" class="rm-shortcode" data-rm-shortcode-id="99d487bc34e6e570edd2a3089e616347"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1318606309256798208" data-partner="rebelmouse"><div style="margin:1em 0">🎥 We're live! @NRDems, @RepRaulGrijalva, and @USRepKCastor are unveiling #OceanClimateAction legislation. W… https://t.co/pPdylA6cKQ</div> — Select Committee on the Climate Crisis (@Select Committee on the Climate Crisis)<a href="https://twitter.com/ClimateCrisis/statuses/1318606309256798208">1603215217.0</a></blockquote></div>
<div id="17f05" class="rm-shortcode" data-rm-shortcode-id="28d7040a5dd41c4d26fed8e93a225655"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1318614724842524674" data-partner="rebelmouse"><div style="margin:1em 0">.@RepRaulGrijalva’s climate bill will ignite #OceanClimateAction to help fight inequality by prioritizing funding f… https://t.co/oeH1W214em</div> — NRDC 🌎🏡 (@NRDC 🌎🏡)<a href="https://twitter.com/NRDC/statuses/1318614724842524674">1603217223.0</a></blockquote></div>
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Poor eating habits, lack of exercise, genetics, and a bunch of other things are known to be behind excessive weight gain. But, did you know that how much sleep you get each night can also determine how much weight you gain or lose?
Almost 300,000 more Americans have died during the first ten months of the coronavirus pandemic than would be expected in an average year, the Centers for Disease Control and Prevention (CDC) reported Tuesday.
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By Julia Conley
A federal judge in Washington, D.C. late Sunday struck down the Trump administration's proposed changes to the SNAP benefits program, potentially saving hundreds of thousands of people from losing badly needed federal food assistance.
<div id="e8d44" class="rm-shortcode" data-rm-shortcode-id="be49aabc36a5465eed30ca54f88f6b2d"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1318171686232096772" data-partner="rebelmouse"><div style="margin:1em 0">A judge has ruled in our favor and blocked the Trump administration’s unlawful changes to SNAP. This decision is… https://t.co/5zeTafxMLm</div> — NY AG James (@NY AG James)<a href="https://twitter.com/NewYorkStateAG/statuses/1318171686232096772">1603111595.0</a></blockquote></div>
<div id="f47ab" class="rm-shortcode" data-rm-shortcode-id="381daa45528adda7398d5628d047294f"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1318175677724676096" data-partner="rebelmouse"><div style="margin:1em 0">There's a lot of competition for Vilest Policy Ever, but slashing food stamps during a pandemic that's causing mass… https://t.co/EYvb0C8Q3m</div> — Tamar Haspel (@Tamar Haspel)<a href="https://twitter.com/TamarHaspel/statuses/1318175677724676096">1603112546.0</a></blockquote></div>
<div id="946d8" class="rm-shortcode" data-rm-shortcode-id="3cff2dc2643fc55ab21d2a73881c7de8"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1318168614541950976" data-partner="rebelmouse"><div style="margin:1em 0">Trump: yes to Space Force, no to Food Stamps. Another equation that might be remembered in a few weeks. https://t.co/9IEDBaMy2o</div> — Matt Taibbi (@Matt Taibbi)<a href="https://twitter.com/mtaibbi/statuses/1318168614541950976">1603110862.0</a></blockquote></div><p>"Trump: yes to Space Force, no to Food Stamps," Taibbi tweeted.</p>
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