Non-renewable energy sources formed from the remains of ancient organisms, such as coal, oil, and natural gas.

The contamination of the natural environment by human activities.

The contamination of the ground by chemicals, fertilizers, and pesticides, which can harm plants and animals living in the soil.

The release of harmful substances such as gases, dust, and smoke into the air, causing damage to the environment and human health.

The contamination of bodies of water such as rivers, lakes, and oceans, usually caused by human activities.