Our best weapon against global climate change may be clean energy. Renewable power, conservation, energy efficiency in buildings
and vehicles, and using clean fuels: these are some solutions that will reduce changes in our climate, The single most important
method of reducing global climate change is...?

A) for the United States to become energy self-sufficient.

B) to ensure that buildings throughout the world are energy efficient.

C) replace fossil fuel combustion with renewable, green power resources.

D)stop the destruction of entire mountaintops to get at the thin coal seams
below.