Question

Which of the following does not describe a source of greenhouse gases?

Steam of fossil fuels
Burning of fossil fuels
Freezing of permafrost
Emissions from landfills

Answer 1

Answer is a steam of fossil fuels

Answer 2

Freezing of Permafrost doesn't describe a source of green house gas.

• The freezing of permafrost cause it to become harder than the rock.
• Organic carbon ( plant materials in soil) cannot decompose or rot away when it is frozen.
• However, the thawing of permafrost due to an increase in the temperature causes all the microbes to decompose the materials stored in it.
• This process of decomposition leads to emission of greenhouse gases like carbon dioxide and methane.