Answer:

• advantages of Acid Rain

It has been known for some time that the oxides of sulfur and nitrogen that serve as substrates for acid rain are not themselves greenhouse gases that contribute to global warming, as are carbon dioxide (CO2) and methane (CH4).

In fact, sulfur dioxide can exert a local cooling effect by reflecting sunlight rather than trapping it within the atmosphere like greenhouse gases. As China continued to increase fossil-fuel production and saw more acid rain at the turn of the 21st century, the country actually saw a cooling trend.

•Disadvantages of Acid Rain

The effects of acid rain on plants is well-studied, particularly those that thrive in aquatic environments, since rain readily finds its way into streams, rivers, lakes and ponds. A major consequence of more acidic water is its retention of aluminum, which can poison forests secondarily by depriving soil of the essential nutrient calcium and making it harder for plants to absorb water from the soil.

There are more harmful effects of acid rain in points where the flora and fauna are naturally more sensitive to fluctuating conditions of acidity. Certain aquatic animals, such as crayfish, are poisoned by the aluminum in habitats rendered more acidic by acid rainfall.