Why did scientists think the world was experiencing global cooling between the 1940’s and 1970’s. a. pollution was blocking sunlight. b. pollution was trapping heat in the atmosphere. c. winters were the longest and coldest since the last ice age. d. biodiversity was declining.

Who needed protection from railroads

Which of the following was true of american workers during the harding administration? a.) few joined unions because there were no unions to join. b.) many joined unions because of fordism. c.) few joined unions because the economy was strong. d.) many joined unions because of unfair labor laws.

How did the end of war and v-j day change working conditions in the u. s.? what did it mean for women in particular?