Environment

1. Nature

1.1. Water

1.1.1. Rivers

1.1.2. Oceans

1.1.3. Rain

1.2. Dirt

1.2.1. Vegetation

1.2.2. Plants

1.2.3. Forest

1.2.3.1. Trees

1.3. Ecosystems

1.3.1. Animals

1.3.2. Gaps

1.3.3. Sun

1.3.4. Fruits

1.3.4.1. Vegetables

2. Extinction

2.1. Contamination

2.2. Deforestation

2.3. Overpopulation

2.4. Wildfires

2.5. Droughts

2.6. Global warming

3. Environmentalism

3.1. Recycle

3.2. Care for the natural resources

3.3. Use the bike

4. Pollution

4.1. Plastics

4.1.1. Monomer and polymer

4.1.2. Hottest temperature

4.1.3. Pressure

5. Natural resources

5.1. Fossil Fuels

5.1.1. Oil

5.1.2. Gasoline

5.1.3. Gas

5.2. Ozone layer

5.2.1. Greenhouse Effect

6. Natural phenomena

6.1. Earthquake

6.1.1. Tsunami

6.1.1.1. Floods

6.2. Landslide

6.3. Volcanic eruption

6.4. Sky

6.4.1. Clouds

6.4.2. Rainbow

6.5. Weather

6.5.1. Hot

6.5.2. Could

6.6. Seasons

6.6.1. Spring

6.6.2. Summer

6.6.3. Fall

6.6.4. Winter

7. Destruction of the environment

7.1. Construction

7.2. Nuclear disasters

7.3. Extraction of fossil fuels