One thing leads to another: Causal chains link health, development, and conservation
(PHYSorg.com Biology)

The linkages between environmental health and human well-being are complex and dynamic, and researchers have developed numerous models and theories for describing them. They include attempts to bridge traditional academic boundaries, uniting fields of study under rubrics such as social-ecological frameworks, coupled human and natural systems, ecosystem services, and resilience theory. However, these efforts have been constrained by varying practices and a failure among practitioners to agree on consistent practices.