air pollution is responsible for a variety of________ problems in animals and plants.

renewable resources can be replaced in your _________ .

what do humans receive from ecosystem

according to EPA every american produces _______ garbage per day

for most part humans ________ or destroy natural environmental balance of ecosystem

_______wastes is anything that is drained into sewer systems

raw materials can be classified as _____and_______.

pollution can be destroyed by it's_______

name natural sources of pollution