Energy conservation refers to reducing the amount of energy used or using energy efficiently. There are renewable energy sources like solar and wind that can be generated continuously, and non-renewable sources like fossil fuels that will be exhausted. It is important to conserve energy because demand is increasing while resources are limited. Individuals can help by recycling, reducing unnecessary energy use, and reusing items to prevent waste. Examples include turning off lights and devices when not in use, using more energy efficient appliances, and reusing seeds, shells, and other materials.