Burninf fossil fuels contributes to the formation of Oa air pollution
Ob global warming
Oc acid precipitation
Od all of them

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

. the sierra madre fault zone of southern california

. the san andreas fault california