HORTICULTURE

Detailed explanation-1: -Without trees, forest areas would become drier and more prone to extreme droughts. Oxygen-carbon dioxide cycle would be disturbed. Due to the absence of the firm roots of these trees and the barrier effect they provide, heavy rains would lead to frequent flooding.

Detailed explanation-2: -Vehicle emissions, fuel oils and natural gas to heat homes, by-products of manufacturing and power generation, particularly coal-fueled power plants, and fumes from chemical production are the primary sources of human-made air pollution.

Detailed explanation-3: -Long-term health effects from air pollution include heart disease, lung cancer, and respiratory diseases such as emphysema. Air pollution can also cause long-term damage to people’s nerves, brain, kidneys, liver, and other organs. Some scientists suspect air pollutants cause birth defects.