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Oct 25, 2021 · Scientists and politicians say we are facing a planetary crisis because of climate change. But what's the evidence for global warming and how do we know it's being caused by humans?
- 421 parts per million. The concentration of carbon dioxide (CO2) in our atmosphere, as of May 2022, is the highest it has been in human history.
- 2023 was the hottest year on record. Analysis by NOAA shows that average global temperatures in 2023 were 2.12 degrees F (1.18 degrees C) warmer than the 20th-century average — and higher than any other year since records began in 1850.
- 20% of emissions. As much as 20 percent of all global greenhouse gas emissions caused by humans are due to deforestation — exceeding the emissions from all of the passenger vehicles on the planet.
- Nature is an untapped solution. Tropical forests are incredibly effective at storing carbon, providing at least a third of the mitigation action needed to prevent the worst climate change scenarios.
Oct 25, 2021 · Greenhouse gases - which trap the Sun's heat - are the crucial link between temperature rise and human activities. The most important is carbon dioxide (CO2), because of its abundance in the...
Climate change is a long-term change in the average weather patterns that have come to define Earth’s local, regional and global climates. These changes have a broad range of observed effects that are synonymous with the term.
Aug 5, 2019 · Human activities are causing Earth to heat up in ways that are different from warm periods in the past. Earth is getting hotter. Since 1900, the average surface air temperature has risen 1.8 degrees Fahrenheit (1 degree Celsius). The steepest rise began in the 1970s and continues today.
Earth's climate has changed throughout history. Just in the last 800,000 years, there have been eight cycles of ice ages and warmer periods, with the end of the last ice age about 11,700 years ago marking the beginning of the modern climate era — and of human civilization.
Feb 8, 2024 · Climate change is the long-term shift in the Earth's average temperatures and weather conditions. Over the last decade, the world was on average around 1.2C warmer than during the late 19th...
