Answer:
i believe b but check with other people
Explanation:
Air pollution. For example nitrogen oxides, carbon monoxide, sulfur dioxide, lead, mercury, and other hazardous air pollutants.
Answer and explanation:
The theory of chemical evolution is one of the most important theories for understanding the origin of life.
This theory admits that life is the result of reactions envolving inorganic compounds that have combined and formed some organic molecules, such as amino acids, nitrogenous bases and fatty acids.
The organic molecules were then combining, until the first particles with some type of metabolism appeared.