Virtually all global warming since the industrial era is caused by manmade emissions, according to research published Monday that concludes Earth’s natural processes contribute only “negligibly” to climate change.
Near-surface air temperatures have increased on average around the world just over one degree Celsius since the mid-19th century.
That 1C increase has already seen more frequent and powerful extreme weather events such as droughts and floods, as well as superstorms made more deadly by rising seas.
The 2015 Paris climate accord commits nations to limit global temperature rises to “well below” 2C (3.6 Fahrenheit) and to a safer cap of 1.5C if possible.
An international team of researchers wanted to better quantify how much warming can be directly contributed to human activity — in the form of greenhouse gas emissions and land use change — and how much is down to so-called “natural forcings”.
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