Although many processes are involved, clearly combustion of fossil fuels is the most important factor driving the global increase in atmospheric and thus global warming.

Temperature

Explanation:

Lots of CO2 is released from the combustion of fossil fuels and as CO2 is a greenhouse gas it is able to trap the solar radiation in the atmosphere which results in the increase in the atmospheric temperature and causing global warming.

Due to this global warming, the glaciers are melting very fast which is increasing the water level of oceans that can results in the tsunami.

The environment is changing fast due to global warming. This is affecting animals, plants, and humans too. Habitat of animals living in the polar areas affected severely due to the increase in global temperature.

layer 3 is younger than layer 6.