15 May 2014
(Reuters) - A group of scientists from more than 20 institutions around the world will gauge the impact on the world's largest rainforest if a time comes when the planet has 30 percent more carbon dioxide (CO2) than today, according to a project launched on Wednesday.
A large experiment including towers that will pump CO2 into plots of dense forests will be built in a region north of Manaus, in the Brazilian Amazonas state.
Sensors and field observation will evaluate the reaction of the trees when subject to a concentration of carbon dioxide 200 parts per million (ppm) higher than the current 400 ppm, already the highest level ever.
Predictions by the U.N.'s panel on climate change (IPCC) indicate that 600 ppm could be the level of CO2 concentration in 50 years time.
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