List 5 environmental issues.
1. Climate change and global warming: This is caused by the release of greenhouse gases emitted from burning fossil fuels and deforestation.
2. Air pollution: This is caused by the release of pollutants into the air from industrial processes, transportation, and other human activities.
3. Water pollution: This is caused by the discharge of untreated waste and chemicals into water sources, impacting wildlife and human health.
4. Deforestation: This refers to the large-scale removal of forests, often for agricultural or commercial purposes, resulting in habitat loss for wildlife and contributing to climate change.
5. Loss of biodiversity: This is caused by a combination of factors, including habitat loss, climate change, and pollution, leading to the extinction of species and the reduction of ecosystems.
Complete the following task based on the instruction and optional input provided.### Instruction:
List 5 environmental issues.

### Output:
1. Climate change and global warming: This is caused by the release of greenhouse gases emitted from burning fossil fuels and deforestation.
2. Air pollution: This is caused by the release of pollutants into the air from industrial processes, transportation, and other human activities.
3. Water pollution: This is caused by the discharge of untreated waste and chemicals into water sources, impacting wildlife and human health.
4. Deforestation: This refers to the large-scale removal of forests, often for agricultural or commercial purposes, resulting in habitat loss for wildlife and contributing to climate change.
5. Loss of biodiversity: This is caused by a combination of factors, including habitat loss, climate change, and pollution, leading to the extinction of species and the reduction of ecosystems.