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 Mid-Oceanic Ridge at the time of formation is hot magma rising below which is of low density than the surrounding rock causing it to rise above surrounding sea-floor.