yes, there are natural forms of pollution, such as methane gas produced when animals fart, (this problem is seen mainly in cows) By increasing the number of cows in the world, humans have also increased natural pollution.
People cause water pollution from throwing garbage and other things into the water. Also, oil and other chemicals cause pollution.
Land pollution can cause fires and other horrible things.
There are many causes of air pollution other than chimney smoke. Cars for example are a leading cause of air pollution.
Greenpeace have written many, many things about pollution. Far to much to repeat here. Generally they, along with most other people who think about such things consider it bad.
hydroelectric causes noise pollution, but other wise there isn't any pollution caused by it.
Yes, the humans cause more air pollution than any other source
Pollution can damage an ecosystem. Pollution can cause plants and other organisms to die, which will affect the circle of life in a particular ecosystem.
It can cause chest pain, congestion, and other serious illnesses.
All other things being equal, more emissions will be released by the older car.
one of the main cause is the spill of oils and other substances from ships...since population is also increasing day by day all sewage water and the industrial waste are drained into the water bodies.
By throwing trash and a lot of toxic things. When people throw trash to the river or the other big places, it will get polluted
cause they have nothing else to do