As of now, about 40 governments around the world, including the European Union and California, have put a price on carbon
Economists argue that in theory taxing the companies that produce fossil fuels or the consumers who buy their products, or perhaps both, should curb the supply of and demand for oil, gas and coal
The idea is to make carbon pollution more expensive so people will use less fossil fuel
OLX explained how purchases of second-hand products have lowered carbon emissions
Researchers identified decreased use of coal in China and the US as the main reason behind the three-year slowdown
Stresses importance of international law as very "effective instrument" for protection of human rights and environment
CO2 reacts with the surrounding rock, forming environmentally benign minerals, researchers said