They release carbon dioxide into the atmosphere which in effect create green house gasses
Evolution would be the answer you may be looking for.
The substance that would be added in order to reverse the reaction would be any substance that is found in the product side. Adding a substance that tends to be a product will shift the equilibrium of the system and will allow the reaction to produce the substances that is found in the reactant side.
Five conditions<span> are required in order for a population to remain at </span>Hardy-Weinberg equilibrium<span>: A large breeding population. Random mating. No change in allelic frequency due to mutation.</span>
The second and third one I believe
