Whether wood is truly renewable or not is a matter of opinion. Trees can be burnt in minutes but regrowth obviously takes many years. Theory has it that new trees can over time recover the carbon dioxide from tree burning but how realistic is that? Not very much, according to experts. The same politicians who attend climate conferences proclaiming ’emissions’ are a terrible problem now actively support making them worse. You couldn’t make it up.
Europe’s decision to promote the use of wood as a “renewable fuel” will likely greatly increase Europe’s greenhouse gas emissions and cause severe harm to the world’s forests, according to a new paper published in Nature Communications.
European officials on final language for a renewable energy directive earlier this summer that will almost double Europe’s use of renewable energy by 2030.
Against the advice of 800 scientists, the directive now treats wood as a low-carbon fuel, reports Phys.org, meaning that whole trees or large portions of trees can be cut down deliberately to burn.
Such uses go beyond papermaking wastes and other wood wastes, which have long been used for bioenergy, but not to this magnitude.
The paper, co-authored by eight scientists from the United States and Europe, estimates that this bioenergy provision in the Renewable Energy Directive will lead to vast new cutting of the world’s forests. This is because additional wood equal to all of Europe’s existing wood harvests will be needed just to supply 5 percent of Europe’s energy.
The paper also estimates that using wood for energy will likely result in 10 to 15 percent [rise] in emissions from Europe’s energy use by 2050. This could occur by turning a 5 percent decrease in emissions required under the directive using solar energy or wind energy into a 5 to 10 increase by using wood.
Europe’s increased wood demand will require additional cutting in forests around the world, but the researchers explain the global impact is likely to be even greater by encouraging other countries to do the same. Already, tropical forest countries like Brazil and Indonesia have announced they, too, will try to reduce the effect of climate change by increasing their use of wood for bioenergy.
“Globally, if the world were to supply only an additional 2 percent of its energy from wood, it would need to double commercial wood harvests around the world with harsh effects on forests,” said study lead author Tim Searchinger, researcher scholar at Princeton University’s Woodrow Wilson School of Public and International Affairs.
Although wood is renewable, cutting down and burning wood for energy increases carbon in the atmosphere for decades to hundreds of years depending on a number of factors, the researchers explained. Bioenergy use in this form takes carbon that would otherwise remain stored in a forest and puts it into the atmosphere.
Because of various inefficiencies in both the harvesting and burning process, the result is that far more carbon is emitted up smokestacks and into the air per kilowatt hour of electricity or heat than burning [other] fossil fuels, the authors explained.
[The paper, “Europe’s renewable energy directive poised to harm global forests,” first appeared online Sept. 12 in Nature Communications.]
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September 13, 2018 at 09:57AM