It is an absolutely true fact that deforestation is related to global warming. The correct option among the two options that are given in the question is the first option. Deforestation has caused the increase in the amount of greenhouse gases and this has lead to increased global warming. I hope it helps you.
It was and still is the Hindu Kush Mountains. Stretching about 500 mi across.
Hulun Buir Grassland is located in northern China; bordering Mongolia and Russia. Its geological classification is high steppes grassland - grassland plains without any tree. It was formed, along with the surrounding lakes, as part of the Mongolia Highlands by the tectonic collision of India into Asia.