Why did scientists think the world was experiencing global cooling between the 1940s and 1970sa. pollution was blocking sunlight b. pollution was trapping heat in the atmosphere c. winter's were the longest and coldest since the last ice aged. biodiversity was declining

What impact did improvements in farming technology near the end of the nineteenth century have on the american economy? a. more energy was needed to power equipment, creating the renewable energy industry. b. less labor was necessary on farms, leading workers to pursue other jobs. c. less money was invested in farming as many locally owned farms went bankrupt. d. more demand for agricultural products reduced the price of food and animal products.

Children begin to use tools at about what age? a. 18 months b. 2 years c. 1 year d. 6 months

Who is on the house judiciary committee 2019