Earth's climate is being altered by human activity from "summary" of Earth in Human Hands by David Grinspoon
Human activity is changing the climate of Earth. We are altering the very atmosphere that we breathe, the oceans that regulate our temperature, and the land that sustains us. Our actions are causing the planet to warm at an unprecedented rate, leading to a cascade of consequences that will affect every living organism on this planet. The evidence is clear: carbon dioxide levels in the atmosphere are higher now than they have been for millions of years. This increase is primarily due to the burning of fossil fuels, such as coal, oil, and natural gas. These activities release huge amounts of carbon dioxide into the atmosphere, trapping heat and causing the planet to warm. But it's not just carbon dioxide that is causing the climate to change. Methane, another potent greenhouse gas, is being released into the atmosphere from sources such as agriculture, landfills, and fossil fuel extraction. Deforestation, which removes trees that absorb carbon dioxide, is also contributing to the problem. The consequences of these changes are already being felt around the world. Glaciers are melting, sea levels are rising, and extreme weather events are becoming more frequent and more severe. The delicate balance of life on Earth is being disrupted, with potentially catastrophic results. We have the power to mitigate these changes, but it will require a concerted effort on a global scale. We must shift away from fossil fuels and towards renewable energy sources. We must protect and restore ecosystems that can help absorb carbon dioxide from the atmosphere. And we must work together to create a more sustainable future for ourselves and for future generations. The time to act is now. The fate of our planet is in our hands, and it is up to us to ensure that we leave a habitable world for those who come after us.
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