How do we assign value to and prioritize the relationships amonghumans, animals, and the natural environment?

In a monetary sense, we can compare the services that the natural environment does for humans with the cost of humans (and their technology) doing it. That puts a monetary amount on it. This is relatively objective, dependent on national economies. In the ';real world';, this is most important and priorities are shifted on, if the environmental problem, affects humans and to what degree. This results in things like the Clean Air Act, the formation of the EPA, etc.


Political pressure also might come from the public's emphasis on the intrinsic value of the natural environment. But this is much more subjective. My value on biodiversity might be less so than yours.How do we assign value to and prioritize the relationships amonghumans, animals, and the natural environment?
Humans come first, next would be animals that serve man in thier order of immportance to man, and than the enviroment as to how it can be used to serve man. All other considerstions are worthless