Best way to fight climate change? Plant a trillion trees | CBC News: - Associcated Press:
July 5, 2019 - "The most effective way to fight global warming is to plant lots of trees, a trillion of them, maybe more, according to a new study. Swiss scientists ... say that even with existing cities and farmland, there's enough space for new trees to cover nine million square kilometres, roughly the size of the United States. Their report is in Thursday's edition of the journal Science.
"The study calculated that over the decades, those new trees could suck up nearly 750 billion tonnes of heat-trapping carbon dioxide from the atmosphere — about as much carbon pollution as humans have spewed in the past 25 years. Much of that benefit will come quickly because trees remove more carbon from the air when they are younger, the study authors said. The potential for removing the most carbon is in the tropics.
"'This is by far — by thousands of times — the cheapest climate change solution' and the most effective, said study co-author Thomas Crowther, a climate change ecologist at the Swiss Federal Institute of Technology in Zurich.... Before his research, Crowther figured there were other more effective ways to fight climate change besides cutting emissions, such as people switching from eating meat to vegetarianism. But, he said, tree planting is far more effective because trees take so much carbon dioxide out of the air.
"Thomas Lovejoy, a conservation biologist at George Mason University in Fairfax, Va., who wasn't part of the study, called it 'a good news story' because planting trees would also help stem the loss of biodiversity.
"Planting trees is not a substitute for weaning the world off burning oil, coal and gas, the chief cause of global warming, Crowther emphasized.... Nor is it easy or realistic to think the world will suddenly go on a tree-planting binge, although many groups have started, Crowther said.
"The researchers used Google Earth to see what areas could support more trees, while leaving room for people and crops. Lead author Jean-François Bastin estimated there's space for at least one trillion more trees, but it could be 1.5 trillion. That's on top of the three trillion trees now on Earth, according to earlier Crowther research. The study's calculations make sense, said Chris Field, an environmental scientist at Stanford University in California who also wasn't part of the study."
Read more: https://www.cbc.ca/news/technology/tree-planting-climate-change-1.5201102
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July 5, 2019 - "The most effective way to fight global warming is to plant lots of trees, a trillion of them, maybe more, according to a new study. Swiss scientists ... say that even with existing cities and farmland, there's enough space for new trees to cover nine million square kilometres, roughly the size of the United States. Their report is in Thursday's edition of the journal Science.
"The study calculated that over the decades, those new trees could suck up nearly 750 billion tonnes of heat-trapping carbon dioxide from the atmosphere — about as much carbon pollution as humans have spewed in the past 25 years. Much of that benefit will come quickly because trees remove more carbon from the air when they are younger, the study authors said. The potential for removing the most carbon is in the tropics.
"'This is by far — by thousands of times — the cheapest climate change solution' and the most effective, said study co-author Thomas Crowther, a climate change ecologist at the Swiss Federal Institute of Technology in Zurich.... Before his research, Crowther figured there were other more effective ways to fight climate change besides cutting emissions, such as people switching from eating meat to vegetarianism. But, he said, tree planting is far more effective because trees take so much carbon dioxide out of the air.
"Thomas Lovejoy, a conservation biologist at George Mason University in Fairfax, Va., who wasn't part of the study, called it 'a good news story' because planting trees would also help stem the loss of biodiversity.
"Planting trees is not a substitute for weaning the world off burning oil, coal and gas, the chief cause of global warming, Crowther emphasized.... Nor is it easy or realistic to think the world will suddenly go on a tree-planting binge, although many groups have started, Crowther said.
"The researchers used Google Earth to see what areas could support more trees, while leaving room for people and crops. Lead author Jean-François Bastin estimated there's space for at least one trillion more trees, but it could be 1.5 trillion. That's on top of the three trillion trees now on Earth, according to earlier Crowther research. The study's calculations make sense, said Chris Field, an environmental scientist at Stanford University in California who also wasn't part of the study."
Read more: https://www.cbc.ca/news/technology/tree-planting-climate-change-1.5201102
'via Blog this'
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