Question

why did scientists think the world was experiencing global cooling between the 1940s and 1970s. 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. please select the best answer from the choices provided

Explanation:

During the 1940s - 1970s, scientists thought pollution was blocking sunlight, which could lead to global cooling. Trapping heat causes warming. Long winters and biodiversity decline are not the main reasons for the perception of global cooling then.

Answer:

A. Pollution was blocking sunlight.