you planted a tree last year and forgot all about it. Today you saw that it was growing and has sprouted leaves. Write your thoughts in the form of a dairy entry.
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‘Tree planting ‘has mind-blowing potential’ to tackle climate crisis.” That’s how the Guardian reported findings from the Crowther Lab in Switzerland two months ago. Billions more trees, scientists claimed, could remove two-thirds of all the carbon dioxide created by human activity. Forest restoration “isn’t just one of our climate change solutions, it is overwhelmingly the top one,” said the lead scientist, climate change ecologist Tom Crowther
Such a programme might take 100 years to be fully effective, but along the way it would reduce the consequences of the climate crisis – protecting soil from erosion, reducing the risk of flooding and providing habitats for a vast range of animals and other plant species.
Some baby steps are already being taken, such as the Bonn Challenge, a global attempt to reforest 350m hectares by 2030. In the UK, tree-planting initiatives include the Northern Forest, which will be made up of 25m trees, spanning the north of England from Liverpool to Hull.
But we need to do much, much more. Another study led by Crowther, published in Nature in 2015, estimated that while there are more than 3 trillion trees in the world, that number had fallen by 46% since the dawn of human civilisation.
In Brazil, the Amazon rainforest continues to shrink by the equivalent of three football fields every minute as land is turned over to cattle ranching, soya-bean production and mining. In August alone, an area the size of Hong Kong disappeared, not including losses from fires.
If you want to do your bit, here are some answers to the big questions.
How many trees should we be planting?
Saplings at Marsden, near Huddersfield, planted as part of the Northern Forest initiative.
Saplings planted as part of the Northern Forest initiative, at Marsden, near Huddersfield. Photograph: Jill Jennings/The Woodland Trust
In its recent report Net Zero: the UK’s contribution to stopping global warming, the Committee on Climate Change says the UK needs to increase its woodland from 13% of land area to 17% (the European average is around 35%). We need to be planting 30,000 hectares annually. “In the 2018-19 season, we did just under 13,000 hectares, of which 11,000 were in Scotland,” says John Tucker, director of woodland outreach at the Woodland Trust. “If you looked at England, we probably need six times more tree-planting. We are way off where we should be.”
In order to hit the target, says Jon Stokes, director of trees, science and research at the Tree Council, “we need a radically different approach in terms of funding, incentives, land availability, har
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