Two reasons: it can be sold for money and to increase the area of ​​arable land.

1. The Amazon rainforest has huge economic value, with 800 million cubic meters of timber, accounting for 45% of the world's total, and an economic value of more than 700 billion US dollars. It can be sold for money if it is developed.

2. With the increase in population, human agricultural planting requires more arable land. Developing the rainforest can bring more arable land to local farmers.