Regarding water, do trees make a difference?

This study, published in 2008, explains how trees in boreal forests help to form clouds. Boreal forests are found in the northern hemisphere. Pine trees, larch trees, and other conifers make up the majority of types of trees found in boreal forests. These trees give off “turpenes” that help to form clouds. Clouds often make rain, and can reflect heat away from the earth. Since rain is essential for rain water harvesting, and we get lots of our water from rain, it might be a good idea to have as many trees around as possible.