2. The global loss of biological diversity affects the wellbeing of both animal and people. Four out of five conditions in humans are environmentally related, so we have already a connection. And the connection is health. For example, habitat damage increases stress in living things, causing greater susceptibility to disease across species and geographic boundaries. The loss of species, the degradation of ecological processes and the contamination of the web of life are working in concert to diminish human and environmental health on this planet.