Human activity is now leading to the equivalent of 40 billion tons of carbon dioxide emitted into the atmosphere each year, putting us on track to increase the planet’s temperature by 1.5 degrees Celsius over pre-industrial levels by 2040. According to the Intergovernmental Panel on Climate Change (IPCC), we must limit global warming to 1.5 degrees Celsius to avoid the most dangerous impacts of climate change.
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Source: Phys.org