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Droughts are declining

Globally, droughts have been in a long-term decline. This is likely due to a slight increase in precipitation and to increasing soil moisture content owing to CO2 fertilization effect.

Source(s): Hao Z, AghaKouchak A, Nakhjiri N et al (2014) Global integrated drought monitoring and prediction system. Sci Data 1, doi:10.1038/sdata.2014.1, EPA Palmer Drought Severity Index,

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