Why was the concern over global cooling replaced with a concern over global warming?
a. The science community needed a cause to frighten the general population.
b. Steady surface temperature increases were noted between the 1970's and 90's.
Air pollution only became a concern in the 1980's.
d. Scientists observed severe ocean acidification.
Please select the best answer from the choices provided

Match the order of the levels of organization in nature with the correct description. example: atoms are fundamental units of matter= level 1levels- 2,3,4,5,6,7,8.now what levels are these? population consists of organismscells consist of moleculesecosystems consist of communities interacting with there environmentmolecules consist of atomsthe biosphere consist of all ecosystems on earthcommunities consists of populationorganisms consist of cells