Question : How does damming pollute the yangtze river in China ? Or any other river ? Anyone knows ??
And how does damming kill the fish population in the rivers ?
Answer : Damming a flowing river alters the environment drastically. In the case of the Yangtze, the Chinese Paddlefish (Psephurus gladius) needs free flowing rivers with riffles free of fine sediments to spawn, and often migrate some distance to find a suitable place. Dams on the Mississippi River in North America have done great damage to the American Paddlefish (Polyodon spathula), the only living relative of the Chinese Paddlefish. They are also filter feeders, and the dam may affect the amount of zooplankton available for them.
Dams also change the water temperature and turbidity usually, and many fish are not tolerant of that sort of thing. Water levels fluctuate less, and in the Missouri-Mississippi drainages that has had a devastating effect on sturgeons.
When we make such major changes to habitat, the effects are huge to the life that depends on it. Changing a river into a lake isn't quite as drastic as taking a fish out of water, but it's closer than you think on many species.
Question : I needed to know what does water pollution do to the living things in the ocean. Like, how does the pollution effect the ocean..the organisms living inside...and the surroundings?
Thank you very much for your help!
Answer : Water pollution is one of the most serious environmental problems we, as a planet, face today. It occurs when substances such as human and other animal wastes, toxic chemicals, metals, and oils contaminate water. This contamination can affect rain, rivers, lakes, oceans, and the water beneath the surface of the earth, ground water (Lanz.)
Human illness. Water polluted with human and animal wastes can spread typhoid fever, cholera, dysentery, and other diseases. About 80 percent of the U.S. community water supplies are disinfected with chlorine to kill disease-causing germs. However, disinfection does not remove harmful chemical compounds, such as polychlorinated biphenyls (PCB's) and chloroform, or harmful metals, such as arsenic, lead, and mercury. The careless release of such toxic wastes, primarily into waste dumps, threatens ground water supplies. PCB's, chloroform, and pesticides have been found in some municipal drinking water. Scientists are concerned that drinkin..
Question : finding as much and enough information about the pollution effect on animals, or the pros and cons of stem cell research, can you help me find websites that can provide me with the information needed in order to make a 4 page paper. thanks. and which idea is much simpler to write about. btw i dont like science thus find it harder to actually write about a topic of this subject thanks again. actually make that information about the pollution effects on the enviorment.
Answer : i'm not sure about specific web sights, but you can ake for example the Willamette in Portland, Oregon, and the bad pollution there and how rivers like that have problems with the salmon run.