What id the primary human cause of the global warming a. storage of nuclear fuel rods b. burning of fossil fuels c. building of high-density housing d. violent conflicts over natural resources

B) Burning Fossil Fuels

Explanation:

Since the increase in technologies and factories, carbon monoxide levels have been heavily increased. The release of carbon monoxide ruins the Earth's atmospheric levels and the ozone levels, which help to reflect off the suns' UV rays. Without a thick ozone layer, and other atmospheric layers, much of the suns' rays are reaching Earth.