The statement global warming occurs naturally on Earth and is enhanced by human activities best describes global warming.
What is an earth?
Earth is the third planet from the Sun and the only astronomical object known to support life.
What is global warming?
- Global warming is the rise in temperature of earth's surface due to the increased amounts of green house gases in the atmosphere.
- Global warming occurs when carbon dioxide and other air pollutants forms in the atmosphere and absorb solar radiation that have bounced off the earth’s surface.
- This radiation would escape into space, but these pollutants, which can last for years to centuries in the atmosphere, trap the heat and cause the planet to get hotter.
- The pollutants like carbon dioxide, methane, nitrous oxide, water vapor, and synthetic fluorinated gases are known as greenhouse gases, and their impact is called the greenhouse effect.
- Human activities have released large amounts of carbon dioxide and other greenhouse gases into the atmosphere, which has changed the earth’s climate leading to global warming.
Hence, option 3 is the answer.
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