What is the main source of air pollution in the world today?
a. coal-burning factories
b. chemical waste from industrial centers
c. carbon emissions from cars and trucks
d. nuclear power plants
i think it's c. but im not sure

Who was the govner during the civil war

What event had weakened florida’s economy immediately before the start of the great depression? a) the freezing of orange trees b) the end of florida’s land boom c) the start of another world war d) the building of florida’s railroads

Determine why chief piapot asserted that the european-led government keeps only half of the promises made to native americans