Gases released during the use of fossil fuels causes global warming, and global warming has great effect on crops and weather conditions around the world. Given these facts, what can have a long term effect on crops and weather conditions around the world among the following options:
- electromagnetic energy
 - A farmer irrigating his crops
 - deforestation
 - Nitrogen in the soil
 - Temperature
 - Use of fossil fuels
 - Burning fuel and air
 - A windy day


 

      Use of fossil fuels   