What is a main cause of acid rain in Europe? A. trains
B. cars
C. factories
D. fertillizers

Which environment would most likely not contain fossils? a a thick deposit of cracked, dried mud b sediment deposited in a sandy river bed c intrusive rock formed from cooled magma d layers of sand accumulated for a century

Why is the indus river so important to the people of pakistan?

How did geographic isolation affect the islands in the australasia ecozobne?