It is worth clicking on the link (WRI – the World Researches Institute) below for a clear view of how forests affect our water supply. The authors point out that “The world’s major watersheds lost 6 percent of their tree cover on average from 2000-2014. Today, about 31 percent of the world’s watershed area is covered by forests.”
The problem is a tension between the facts they point out and the needs of an expanding global population to have food, energy and occupy land. The tension between the two is an exponential curve related to population growth. Something will give. Unless, that is, we control population growth and very urgently.
Click here for an expansion of this discussion, and what to do about it,
Land Research 12 May 2017