Atmospheric pollution
John Brennanにより

1. CFC gases
1.1. Damage Ozone layer
2. Fossil fuels
2.1. Coal
2.2. Oil
2.2.1. Carbon Particles
2.3. Gas
2.4. Power stations
2.4.1. CO2
2.4.1.1. Greenhouse effect
2.4.2. SO2
2.4.2.1. Acid Rain
2.5. Cars
2.5.1. NOX
2.5.1.1. Causes smog
2.5.1.2. Causes Asthma.