Which Is the Single Greatest Obstacle to Slowing Climate Change

Multiple Choice

Which is the single greatest obstacle to slowing climate change?

A) having scientists decide on a definition of climate change
B) a lack of data portraying the effects of climate change
C) meeting energy needs, particularly in energy-hungry countries such as the United States, China, and India
D) the growing population of the poorer nations in the world
E) proper climatic changes