The bio-fuel ethanol as a solution to acid deposition is based on which of the following?
1.) Wheat Production
2.) Corn Production
3.) Cotton Production
4.) Clean Coal Production

Astudent conducts an experiment to see how music affects plant growth. the student obtains four identical plants. each one is potted in the same type of soil and receives the same amount of sunlight and water each day. plant a listens to classical music for three hours each day. plant b listens to rock music for three hours each day. plant c listens to country music for three hours each day. plant d does not listen to any music at all. 2. based on the experiment in the scenario, which visual aid would be most in showing the change in the plants' heights over time? a. a pie chart b. a line graph c. a timeline d. a bar graph

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution

Which of the following types of nonrenewable fuel sources requires the storage of radioactive waste? a. coal b. nuclear c. solar d. oil