Which factors add to the greenhouse effect and are caused by human activities? Select two options.

a decrease in the amount of dust in the atmosphere
a decrease in the amount of water on Earth’s surface
an increase in gases in the atmosphere that absorb heat
an increase in surfaces that radiate energy into the atmosphere
an increase in the amount of solar radiation that reflects into space

C

Explanation:

greenhouse gases keep heat on the earth

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.

answer; i believe the correct answer is (a)0