More trees help water sanitation, reduce child deaths: Study

More trees at water sources improve sanitation and lead to fewer children dying from diarrhoea in poor countries.

This is according to a global study released Monday.

The study examined the health of 300 000 children and the quality of watersheds across 35 countries including Bangladesh, Nigeria and Colombia, and found that having more trees upstream led to healthier children.

"This shows, very clearly, how healthy ecosystems can directly support human health and welfare," says co-author of the study, Brendan Fisher, a researcher at the University of Vermont in the United States.

"This suggests that protecting watersheds, in the right circumstances, can double as a public health investment," he says in a statement.

The study, which analysed US foreign aid data spanning three decades, said increasing the number of trees by a third near the source of watersheds in rural areas could improve water sanitation as effectively as installing indoor plumbing or toilets.

"These findings clearly show that forests and other natural systems can complement traditional water sanitation systems, and help compensate for a lack of infrastructure," says Diego Herrera, lead author of the study which was published in the journal Nature Communications.

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