I need some help on my test.

Can someone list any possible solutions to air pollution ?

Stages 1 and 4 of the demographic transition are similar in that

Which of the following best describes brazil's economy from 1650-1880? a. it gradually shifted to manufacturing as the industrial revolution progressed. b. it was based on mining. c. it was based on plantation agriculture, where slaves served as a labor force. d. it was based on small, family-owned farms.