| Term | Definition |
| fossil fuel | fuel created from remains of plants and animals over millions of years |
| solar panel | electrical device consisting of a large array of connected solar cells |
| thermal energy | the kinetic energy of moving paricles of a substance or objects |
| environment | refers to all of the surroundings and the conditions that affect living things. |
| harmful | causing or capable of causing harm |
| pollutant | waste matter that contaminates the water or air or soil |
| pollution | the act of contaminating or polluting |