<u>Answer:</u>
Scientists say global warming is largely due to a natural cycle it is evident from the fact that humans once settled in areas now covered by glaciers.
<u>Explanation</u>:
- It is seen on the geological timescale that the Earth has had five major ice ages that occurred as a result of tremendous changes in the climate from time to time.
- It is now believed that another ice age is due and the climate change that we are getting to experience is an indication that the ice age about to occur soon.
- Thus, a few scientists sat that global warming is largely due to a natural cycle.
The asthenosphere is weaker and less rigid than the overlying lithosphere.
Ammonia A ..... c,b,d all come from crude oil
