Coal gasification

Coal has been used since the industrial revolution but only in the last 100 years have huge quantities of oil and gas been removed from underground reservoirs.
Oil and gas are used as fuel energy in combustion engines and as "feed stock" for other industries — raw materials for the manufacture of other chemicals, such as plastics and agricultural fertilizer.
There is a limited amount of fossil fuel. It is not "renewable" and there is no known way to make more.
The energy stored in oil is significantly greater than in any other currently available source. Data should be checked, but I found that we the Earth have 10exp11 ton of oil and 10exp10 ton of oil equivalent of coal.

There is no other equivalently cheap and powerful energy available from nuclear energy, natural gas, solar power, wind power, hydrogen or biomass.
So will need to develop coal gasification (a way of transforming solid coal in gases and afterwads in liquids), for example, to produce valualbe Ammonia and Urea (nitrogen fertilizers). It was the case for Germany in the ninetenth century, South Africa in the apartheid and there is a boom in China now.
But burning coal produces CO2, a greenhouse effect gas...Coal technology must be greener!