1. What is it
1.1. Increase of earth's average surface temperature
2. Causes
2.1. Natural
2.1.1. Forest fires
2.1.2. Permafrost
2.1.3. Sunspots
2.1.4. Water vapor
2.2. Man-made
2.2.1. Fossil fuels
2.2.1.1. coal
2.2.1.2. natural gas
2.2.1.3. petroleum products
2.2.1.4. non-renewable waste
2.2.1.4.1. plastics
2.2.1.4.2. fossil oils
2.2.2. Overpopulation
2.2.2.1. limited resources such as food, water, and energy, increased pollution
2.2.3. Fertilizer use
2.3. Greenhouse gas emissions
2.3.1. Carbon dioxide (CO2)
2.3.1.1. most common greenhouse gas, primarily generated by fossil fuels and industrial processes.
2.3.2. Methane (CH4)
2.3.2.1. produced during the decomposition of organic matter
2.3.3. Nitrous oxide (N2O)
2.3.3.1. industrial processes
3. Impacts
3.1. Climate Change
3.1.1. because of gases
3.2. Hurricanes
3.3. Rise of sea levels
3.4. Economic Impacts
3.5. Health effects
3.5.1. can be toxic and harmful to human health when inhaled
3.6. Longer/Shorter seasons
3.7. Earthquakes
3.7.1. Tsunami
3.7.2. Economic impacts
3.7.3. physical damage
3.7.4. evacuation
3.7.5. changes in geographical features, landslides
4. food for plants
5. How to prevent?
5.1. Expand the use of renewable nergy
5.1.1. Solar, wind powers