Condensation-the conversion of a vapor or gas into a liquid.

Precipitation- rain, snow, sleet, or hail that falls to the ground.

Evaporation- process of turning liquid into vapor

Respiration-the process of breathing where oxygen is inhaled and carbon dioxide is exhaled

Fossil fuel- a natural fuel such as coal or gas, formed in the geological past from remains of organic matter

Deforestation- the action of clearing a whole area of trees