Answer:
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Explanation:
Human activities are the main cause of acid rain. Over the past few decades, humans have released so many different chemicals into the air that they have changed the mix of gases in the atmosphere. ... In addition, the exhaust from cars, trucks, and buses releases nitrogen oxides and sulfur dioxide into the air.
Rotting vegetation and erupting volcanoes release some chemicals that can cause acid rain, but most acid rain is a product of human activities. The biggest sources are coal-burning power plants, factories, and automobiles.
Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents. The SO2 and NOX react with water, oxygen and other chemicals to form sulfuric and nitric acids. These then mix with water and other materials before falling to the ground.
A polymer<span> is a large macromolecule made up of many repeating, smaller units. These units are called </span>monomers, and can vary in size and composition. Polymers can be made from chains of just one type of monomer<span> or several </span>monomers<span>. The number of individual </span>monomers <span>in a </span>polymer chain<span> can range from small to large </span>
Answer:
the Sympatric speciation is the evolution of a new species from a surviving ancestral species while both continue to inhabit the same geographic region
