1. Fatberg: A 15-ton blob of congealed fat in a London sewer. It’s a byproduct of the lasting damage to the environment a single community can cause.
It’s a threat to human life as well because there’s plenty of Fatberg waddling around above the sewers.
2. The Great Ocean Garbage Patch: An accumulation of 13,000 pieces per square kilometer of plastic over an area some calculate as twice the size of Texas. As it breaks down into confetti-size bits, it releases chemicals into the water and then enters the food chain, where it’s a threat to marine and avian wildlife.
It’s also a threat to the human life that eats the wildlife because basically, we’re eating our own pollution.
3. Jiapingtang River, China: A river outside of Shanghai supplying drinking water to over 23,000,000 people. Last April 16,000 rotting pig carcasses had to be removed. After the removal, about 1,000 dead ducks surfaced and were also removed.
Since April, the river has turned an inky black with a thin layer of slimy algae on its surface and smells like a backed-up drain.
4. Blood-red Trinity River, Dallas TX: A river fed with pigs’ blood originating from the nearby Columbia (meat) Packing Co, Inc.
Source: Discovery News, August 8, 2013 And other sources