Included was a warning: drought and crop failures could trigger major population movements and lead to political instability.

NPR: U.S. Report Links Climate Change to Security

"During the past 12 months we have experienced both drought and floods and the Met Office is warning there may be more extremes of weather in the future, " he said.

BBC: Southern Water could recycle wastewater

Drought events in Meso America and Caribbean: Diagnosis and warning.

UNESCO: Publicaciones