The given diagram demonstrates  the greenhouse effect on the earth through  increased emission of 
carbon
 Use synonyms
dioxide
 via burning fuel and decreased reabsorption  of the gas Use synonyms
due to
 the felling of trees.
Looking from an Linking Words
overall
 perspective it is readily apparent that global warming is a vicious cycle which initiates with excessive production  and unsuccessful  reabsorption of Linking Words
carbon
 Use synonyms
dioxide
 which are the result of excessive burning of fossils and massive deforestation respectively.
The sun is the greatest source of power to our planet, it delivers light, and Use synonyms
heat
 in electromagnetic waves.Use synonyms
Heat
 power derived from the sun is absorbed by the ground and water and they emit Use synonyms
this
 power as Linking Words
heat
 rays again into the higher atmosphere  making the earth cool and comfortable.
Vehicles which use burning fossil as their energy source surplus  a lot of Use synonyms
carbon
 Use synonyms
dioxide
, exceeding the limits that  nature can handle.Use synonyms
Furthermore
 ,the exponential amount of Linking Words
heat
  emitted  into the environment by factories Use synonyms
while
 generating energy through burning hydrocarbons releases Linking Words
carbon
 Use synonyms
dioxide
.Use synonyms
on the other hand
 ,cutting down trees that are natural detoxifiers of green gases has contributed to Linking Words
this
 issue in a critical way.These gases form a layer of thick clouds which obstruct the pathway of reflection of Linking Words
heat
 from the lower atmosphere to the upper,trapping the warmth within the globe and causing global warming.Use synonyms