New research says most of carbon emissions caused by humans could be fixed by global planting projects. Worldwide, the report says there is 1.7 billion hectares of land where trees could be grown. This accounts for just over one-tenth of all land on earth. All urban spots and areas where crops are grown were not included. The report's lead researcher, Professor Tom Crowther, says tree restoration is far more powerful than previously thought. He adds that it would take up to a century to be fully effective in removing carbon dioxide. Even though it doesn't detail a planting program, Crowther says it is the cheapest way to combat climate change. He adds anyone can get involved by donating to restoration groups or planting on their own.
