- Vehicle emissions

- Industrial emissions

- Power plant emissions

- Wildfires

- Residential heating and cooking

Water pollution

- Sewage and wastewater

- Industrial waste

- Agricultural runoff

- Oil spills

- Plastic pollution

Land pollution

- Industrial waste

- Mining waste

- Landfill waste

- Deforestation

- Soil erosion

Noise pollution

- Traffic noise

- Industrial noise

- Construction noise

- Aircraft noise

- Recreational noise

Light pollution

- Streetlights

- Building lights

- Signs

- Billboards

- Sports stadiums

Thermal pollution

- Power plant discharges

- Industrial discharges

- Urban runoff

- Deforestation

- Climate change