A United Nations draft report has suggested taking America back in time to mitigate climate change.

Carbon emissions should be scaled back to turn-of-the-century levels, close to what they were in 1901 or 1902, said a draft study written for the UN, Bloomberg News reported.

Titled "Pathways to Deep Carbonization," the report says that emissions should drop to a tenth of current levels per person within the next four decades. The study divides energy resources into two categories: "primary energy" and "final energy."

Primary energy comprises coal, oil, natural gas, renewables, nuclear and biomass, as they are when taken out of nature, while final energy is when sources have been changed to be used as energy, such as electricity and liquid fuels. 

Every year, Americans contribute around 18 tons of carbon dioxide apiece. The U.S., China, Russia and the U.K. are among the countries with the highest emission levels, according to the study, which was written by two organizations to give lawmakers guidelines to fight pollution.

''A really low emissions future is not a pipe dream,'' said Frank Jotzo, an economist from the Australian National University, as quoted by the Sydney Morning Herald. ''It is possible in Australia and it is also possible in fast growing developing countries including China and India.''

Jotzo, who worked on the Australian section of the UN report, said that changes were "technically possible" but needed to happen soon.

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