2. what human activity produces the majority of these gases in the u. s. 3. in a natural environment, what contributes to surface water alkalinity (resistance to change in ph)? 4. explain how acid rain might negatively impact aquatic ecosystems.

Human activity produces Carbon monoxide and dioxide, Sulphur and other pollutants.

Explanation:

Human activity produces various gases in the U.S like dust and other harmful chemicals like carbon dioxide and methane and nitrogen oxides as the industry produces 22%, transport produces 29% and electricity produce 28% of harmful toxin and gases that release every year in the air. Total alkalinity is affected by environmental factors like acid rains overtimes. Due to increased use of pollutant gases and continuous release of large matter in the air that over time destroys the oxygen content from river lakes and harms the vegetation cover. Acidic rain precipitation usually takes in the form of rain which has high acid components like sulfur and nitrogen oxides that react with the water molecules to form. this train consists of a mixture of sleet fog and dry acidifying particles that can break through the buildings.  Thus in 1970 USA made an acid deposition act due to the increased emission rates of industrial pollutants. Beef, cheese, pork and lamb substance were found in this artificially induced rain. Many fish tend to die due to the river becoming acidic for them to survive.

Ithink the answer to that would be b):

The answer is b im not sure