The truth is that forests are expanding and not shrinking. Deserts that were once too hot to support vegetative growth are cooling and cold areas are warming in a phenomena that many have contributed to man made C02. Production. But in reality what we are facing is more of a case of man made weather control on top of earth generated fixes to the earth through natural stasis.
What is the difference between tree cover and forest cover? The same applies to choosing landscaping trees. A natural forest has high trees, medium high trees and ground cover. To gain maximum eco-system effects you should landscape your property the same way by choosing trees and ground cover just like nature does. The effects not only look better and more natural, it has a better overall effect on stasis.