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Climate change is accelerating the spread of lethal algal blooms in American waterways—with devastating results for humans and animals alike.
Humans and animals who stumble across a brightly colored blue-green or red pool don’t always recognize the threat. Toxic algal blooms aren’t high on many people’s radar. Vacation-goers obliviously wade into ocean and lake waters that can cause gastrointestinal or respiratory problems. They eat contaminated fish and shellfish with potentially lethal consequences. Dog owners unknowingly allow their beloved pets to frolic in toxic ponds—leading to death within hours.
Toxic algae is one of the quickest-spreading deadly effects of the climate crisis in the United States. As the Arctic’s glaciers melt and the Amazon’s rainforest burns, America’s lakes, rivers, and coastlines are being increasingly infiltrated by several different types of brightly colored, toxic algae bacterium that thrive in warm, nutrient-rich conditions. A report released by the Environmental Working Group earlier this month found toxic algae appearing in more bodies of water, at higher quantities, and earlier in the summer than ever before. It also found that “climate change is making things worse, as scientists predict that warming waters coupled with fertilizer and manure washing off farm fields during heavier and more frequent rains may accelerate the frequency and intensity of harmful algal blooms in freshwater.”
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