If gases released during the use of fossil fuels can effect crops and weather conditions around the world, then what can have a long term effect on crops and weather conditions around the world?

Answer choices:
- 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    