Cyanobacteria, also known as blue-green algae, has survived on earth for 2.5 billion years. It’s now found in large blooms in fresh water with high levels of nitrogen and phosphorus caused by factories, waste facilities, chemical fertilizers, and other pollutants. The bacteria is toxic and makes the water unsuitable for human use.

Damage to the liver, intestines, and nervous system is possible if people consume the water or contaminated fish and shellfish. The bacteria threatens waterways worldwide, and the warming climate is making things worse.

Read the full article here: Modern Worldwide Danger Blooms from Ancient Bacteria