Answer in short:

What are the major causes of degradation of forest in Brazil and India?

Causes of degradation of forests:

1. Deforestation is the major cause for degradation of forests. It is done for mining, building dams, expanding agriculture etc.

2. Industrial development has caused degradation of forests through pollution, over-exploitation, encroachments etc.

Rainforests have decreased in size primarily due to deforestation. Despite reductions in the deforestation rate over the last ten years, the Amazon rainforest will be reduced by 40% by 2030 at the current rate.