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Evidence of Climate Change
The evidence for climate change is extensive and multifaceted. It includes:
* Rising Global Temperatures: The Earth's average surface temperature has risen by about 1.1 degrees Celsius (2 degrees Fahrenheit) since the late 19th century.
* Shrinking Ice Caps and Glaciers: The polar ice caps and mountain glaciers are melting at an alarming rate, contributing to rising sea levels.
* Sea Level Rise: Global sea levels have risen by about 20 centimeters (8 inches) over the past century, with the rate of increase accelerating in recent decades.
* Extreme Weather Events: There is an increase in the frequency and intensity of extreme weather events such as hurricanes, heatwaves, droughts, and heavy rainfall.
* Ocean Acidification: The oceans absorb about 30% of the CO2 emitted by human activities, leading to increased acidity, which affects marine life, particularly shellfish and coral reefs.
The Role of Human Activities
Human activities are the primary drivers of the recent changes in climate. The main sources of GHG emissions include:
* Burning of Fossil Fuels: For electricity, heat, and transportation, which releases large amounts of CO2.
* Deforestation: Trees absorb CO2, and cutting them down reduces the Earth's capacity to sequester carbon.
* Industrial Processes: Certain chemical reactions necessary for the production of goods release GHGs.
* Agriculture: Livestock produce methane during digestion, and the use of fertilizers releases nitrous oxide
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