Global warming or climate change has today become a major threat to the mankind. The Earth’s temperature is on the rise and there are various reasons for it such as greenhouse gases emanating from carbon dioxide (

) emissions, burning of fossil fuels or deforestation. 

Impact of Greenhouse Gases

The rise in the levels of carbon dioxide (

) leads to substantial increase in temperature. It is because 

 remains concentrated in the atmosphere for even hundreds of years. Due to activities like fossil fuel combustion for electricity generation, transportation, and heating, human beings have contributed to increase in the 

 concentration in the atmosphere.