Definition of Deforestation:
Deforestation refers to the process of clearing forests or trees on a large scale, usually to make way for agriculture, urban development, or logging activities.

How Deforestation Leads to Less Rainfall:
- Reduction in Evapotranspiration: Trees play a crucial role in the water cycle by absorbing water from the soil and releasing it into the atmosphere through a process called evapotranspiration. When forests are cleared, this process is disrupted, leading to a decrease in the amount of water vapor in the air. This reduction can result in less rainfall in the region.
- Changes in Local Climate: Trees also help regulate local climate conditions by providing shade, releasing moisture, and influencing wind patterns. Deforestation can cause shifts in temperature and humidity levels, which may further impact rainfall patterns in the area.

How Deforestation Leads to Pollution:
- Air Pollution: Deforestation releases large amounts of carbon dioxide into the atmosphere, contributing to global warming and climate change. Additionally, the burning of trees and vegetation during deforestation releases harmful pollutants and particulate matter into the air, leading to air pollution.
- Water Pollution: Deforestation can also result in increased sedimentation in rivers and streams, as soil erosion becomes more prevalent without the root systems of trees to hold the soil in place. This sedimentation can degrade water quality and harm aquatic ecosystems.
In conclusion, deforestation can have significant impacts on both rainfall patterns and pollution levels in an area. It is essential to address deforestation through sustainable land management practices to mitigate these negative effects on the environment.