Rising CO2 Keeps Trees From Cooling Earth

Trees help keep the planet cool, but rising levels of carbon dioxide in the atmosphere are preventing them from performing this very important function. According to a new study in PNAS, in some regions more than a quarter of the warming from increased carbon dioxide is due to its direct impact on vegetation. This warming is in addition to carbon dioxide's better-known effect as a heat-trapping greenhouse gas. The new paper highlights the importance of including plants in the models that forecast future climate change. read more

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