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Background Info
• Global Warming is an increase in global average surface temperature due to natural or anthropogenic climate change.
• The global surface area increase 1.33 degrees Fahrenheit during the 20th century.
• The last 30 years has seen the highest surface temperatures recorded in history.
• Glaciers are melting rapidly
• Ocean temperatures have increased.
• Sea levels have risen almost one foot.
• The production and absorption of carbon dioxide and other greenhouse gases in not in balance.
Global Warming
Global warming is the increase in the average temperature of the Earth's near-surface air and oceans since the mid-20th century and its projected continuation. Till now, global surface temperature has increased up to 2°C.
It happens when greenhouse gases (carbon dioxide, water vapor, nitrous oxide, and methane) trap heat and light from the sun in the earth’s atmosphere, which increases the temperature. This results to the damage of wildlife, plants and mankind. During the last 100 years, sea levels have risen 4 to 8 inches.
Causes of Global Warming
• The release of methane gas from arctic tundra and wetlands
• Burning of fossil fuels like petroleum gives off carbon dioxide which is 72% of emitted gases worldwide.
• Increase in population also helps increase global warming. As the population increases, there is need of more resources. Also, we all exhale carbon dioxide, which also increases global warming.
• Increase in Transport like cars and motorcycles also
increase emission of carbon dioxide.
• Deforestation is also one of the main causes. Trees take in carbon dioxide and give off oxygen in photosynthesis. If we cut-off trees, there is no one to take in carbon dioxide.
Effects of Global Warming
5. Spread of disease
As northern countries warm, disease carrying insects migrate north, bringing plague and disease with them.
4. Warmer waters and more hurricanes
As the temperature of oceans rise, so will the probability of more frequent and stronger hurricanes.
3. Increased probability and intensity of droughts and heat waves
2. Economic Consequences
Hurricanes and diseases cost money which affect a country’s economy
1. Polar ice caps melting
• Raise sea levels.
• Raise temperatures
• Affect Wildlife