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We found a strong link between the rise in atmospheric CO2 concentrations and a greening that’s been observed across many of the world’s arid environments.

Previous experiments from greenhouses have shown that plants when they’re grown in dry conditions are much more efficient at using water under higher CO2 levels than they are under low levels.

So what this should mean across whole landscapes that are dry is that there should be a general increase in vegetation foliage cover and that increase in foliage cover should be in proportion with the known rises of CO2 levels.

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