
American Rivers
By Fay Augustyn
As we all learned in school, the Great Lakes are an immense source of freshwater. In fact, they are the largest system of freshwater lakes in the entire world and contain nearly one-fifth of the fresh surface water found on Earth. They provide drinking water to more than 40 million people, cover an area nearly the size of Oregon and contain a wide variety of habitats, including wetlands, dunes and forests, which are home to thousands of plant and animal species.
Despite the vast and perceived pristine nature of the Great Lakes, they face many threats. The waters of the lakes are not unlimited—on average, less than one percent is renewed annually from rainfall, runoff and groundwater. Invasive species and water pollution also are persistent threats. Failing infrastructure causes the release of raw and partially treated sewage, which contain bacteria and other pathogens that make people sick, into waterways that flow into the Great Lakes. In addition, sediment and fertilizers from urban and agricultural areas are carried by stormwater and irrigation runoff, adding to the heavy load of nutrients and other pollutants in the lakes.
These nutrients help to fuel the growth of algal blooms, thick green masses of foul-smelling slimy algae that can cover lakes. While not all algal blooms produce toxins, those that do, like blue-green algae, can kill wildlife and family pets, and make people sick. In the past three years, 100 cases of illness and at least two dog deaths have been reported in Wisconsin alone. Algae also can clog pipes, taint drinking water supplies and contaminate seafood. And this is not a problem confined only to the Great Lakes—algal blooms occur in freshwater lakes and in coastal areas all over the U.S.
Because of climate change, occurrences of algal blooms are only likely to worsen as conditions become more favorable. Recent research indicates that the 2011 algal bloom in Lake Erie, the largest in its recorded history, occurred as a result of conditions expected to become commonplace in the future. The predominant type of algae in the 2011 bloom produced a potent liver toxin that was found at levels up to 200 times the World Health Organization's limit. As climate change fuels more heavy rainfall events, combined sewer systems are likely to be quickly overwhelmed, leading to the release of sewage during overflow events. Several weeks ago, torrential rainfall caused 12 Wisconsin municipalities to dump nearly 53 million gallons of untreated sewage and stormwater into neighboring waterways. Heavy rainfall also will likely increase the volume of nutrient-rich stormwater and agricultural runoff. Additionally, warmer temperatures support the growth of algae. Together, these factors create near-perfect conditions for the occurrence and spread of harmful algal blooms.
In a joint effort to guide state action on climate and water preparedness, American Rivers and the Natural Resources Defense Council recently published the Getting Climate Smart guide, which contains a variety of strategies to reduce runoff and sewer overflows that provide nutrients for algal blooms to thrive. The guide also offers strategies to minimize public health impacts when harmful algal blooms occur. Green infrastructure to reduce stormwater runoff into combined sewer systems and greater public awareness during harmful algal bloom outbreaks are but a few examples.
In recent years, Wisconsin has adopted rules to reduce the amount of phosphorus released into waterways. A few states also are making progress when it comes to alerting the public about the danger of harmful algal blooms. Several Ohio state agencies have collaborated on an algae awareness website, which provides basic information on harmful algal blooms and a map of active advisories. The state even has established standards for the postings of recreational advisories.
The public also can report sightings of blue-green algae through the website for further investigation. Washington state and King County have collaborated on a similar website that also shows the results of algae sampling data statewide. For the Gulf of Mexico region, National Oceanic and Atmospheric Administration has developed an early detection and forecasting system that uses data from satellite, buoys and other sources to monitor and forecast harmful algal blooms. The dissemination of this information to local health officials then can help them to alert the public to take the appropriate precautions.
The impacts of climate change are wide-ranging, and no region of the country or sector is likely to be left unscathed. Some climate impacts like drought and flooding are relatively well known whereas awareness of other impacts like harmful algal blooms is not as widespread. The broad nature of climate change impacts underscores the need for states to be prepared. And our Getting Climate Smart guide shows them how.
Correction: An earlier version of this article misspelled Natural Resources Defense Council.
By Brett Wilkins
One hundred seconds to midnight. That's how close humanity is to the apocalypse, and it's as close as the world has ever been, according to Wednesday's annual announcement from the Bulletin of the Atomic Scientists, a group that has been running its "Doomsday Clock" since the early years of the nuclear age in 1947.
EcoWatch Daily Newsletter
North Atlantic right whales are in serious trouble, but there is hope. A total of 14 new calves of the extremely endangered species have been spotted this winter between Florida and North Carolina.
- Scientists Discover New Population of Endangered Blue Whales ... ›
- Endangered Blue Whales Make 'Unprecedented' Comeback to ... ›
- Endangered North Atlantic Right Whale Calves Spotted Off Coast ... ›
- Only 366 Endangered Right Whales Are Alive: New NOAA Report ... ›
Trending
By Yoram Vodovotz and Michael Parkinson
The majority of Americans are stressed, sleep-deprived and overweight and suffer from largely preventable lifestyle diseases such as heart disease, cancer, stroke and diabetes. Being overweight or obese contributes to the 50% of adults who suffer high blood pressure, 10% with diabetes and additional 35% with pre-diabetes. And the costs are unaffordable and growing. About 90% of the nearly $4 trillion Americans spend annually for health care in the U.S. is for chronic diseases and mental health conditions. But there are new lifestyle "medicines" that are free that doctors could be prescribing for all their patients.
Use the Healthy Eating Plate as an evidence-based guide for creating healthy, balanced meals. ©2011, Harvard University, CC BY-NC
Taking an unconventional approach to conduct the largest-ever poll on climate change, the United Nations' Development Program and the University of Oxford surveyed 1.2 million people across 50 countries from October to December of 2020 through ads distributed in mobile gaming apps.
- Guardian/Vice Poll Finds Most 2020 Voters Favor Climate Action ... ›
- Climate Change Seen as Top Threat in Global Survey - EcoWatch ›
- The U.S. Has More Climate Deniers Than Any Other Wealthy Nation ... ›
By Tara Lohan
Fall used to be the time when millions of monarch butterflies in North America would journey upwards of 2,000 miles to warmer winter habitat.
A monarch butterfly caterpillar feeds on common milkweed on Poplar Island in Maryland. Photo: Will Parson/Chesapeake Bay Program, (CC BY-NC 2.0)