Question

how does combustion of fuels cause global warming?

Answer 1

Combustion of different kinds of fuels yields different kinds of greenhouse gases which contribute to global warming. Burning of liquid hydrocarbon fuels leads to emission of a significant amount of CO₂, while burning biofuels releases a lot of methane(CH₄). Both these gases absorb infrared radiation from the sun and emit it back upon the earth. This causes a rise in temperatures on the Earth and hence causes global warming.