I can't say definitely. It may be everyone as it had to be due to sudden rise in demands for our population grew at an incredible pace. 

Who is responsible for deforestation? 
 Who are the primary actors? 

Bell_curve

Yes, I agree. Cutting down decaying trees is worth but when I look back last 100 years, it was too much.

While half of Earth's loss of forests occurred from 10,000 years ago to 1900, the other half or 1.1 billion hectares have been lost since 1900.

econ

Banning Fossil Fuels Will Make Heat Waves More Dangerous, Not Less

Undisciplined

Yes, I agree. Cutting down decaying trees is worth but when I look back last 100 years, it was too much. 

> While half of Earth's loss of forests occurred from 10,000 years ago to 1900, the other half or 1.1 billion hectares have been lost since 1900.