Which phrase describes the purpose of today’s wind farms?

to use wind power to make chemical energy

to use geothermal energy for power

to provide power to hydrogen fuel cells

to change wind into mechanical energy to make electricity

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.