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.
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.
There are many causes of air pollution other than chimney smoke. Cars for example are a leading cause of air pollution.
Yes, the humans cause more air pollution than any other source
hydroelectric causes noise pollution, but other wise there isn't any pollution caused by it.
cause they have nothing else to do
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.
All other things being equal, more emissions will be released by the older car.
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.
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
Contaminating drinking water, killing and poisoning water-based food resources, and poisoning recreational waters are ways that water pollution affect people. Pollution can make water life-threatening to drink and to boat, fish, snorkel or swim in. It also deforms, kills and toxifies food sources -- such as fish, seaweed and turtles -- for people, pets and wildlife.