Tropical forests help cool the average global temperature by more than 1 degree Celsius, a new study finds. The effect stems largely from forests' capacity to capture and store atmospheric Scientists warn that humans must limit the rise in global average temperature to less than 2.7 degrees Fahrenheit (1.5 degrees Celsius) to avoid the most catastrophic effects of climate change The long-term global warming trend is largely due to human activities that have increased emissions of carbon dioxide and other greenhouse gases into the atmosphere. The planet is already seeing the effects of global warming: Arctic sea ice is declining, sea levels are rising, and wildfires are becoming more severe. Understanding how the planet Ecosystems: Global warming stresses ecosystems through temperature rises, water shortages, increased fire threats, drought, weed and pest invasions, intense storm damage and salt invasion, just to name a few. Some of Australia's great natural icons, such as the Great Barrier Reef, are already threatened. Species: One in six species is at risk Potential effects of global warming. The path of future climate change will depend on what courses of action are taken by society—in particular the emission of greenhouse gases from the burning of fossil fuels.A range of alternative emission scenarios has been proposed by the IPCC since the Fifth Assessment Report (AR5), which was published in 2014, to examine potential future climate changes. since 1970. Since 1900, the global average surface temperature has increased by about 1 °C (1.8 °F). This has been accompanied by warming of the ocean, a rise in sea level, a strong decline in Arctic sea ice, widespread increases in the frequency and intensity of heatwaves, and many other associated climate effects. Much of this warming has .

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