[human]nature works to encourage those who wish to explore the depths to which they are connected and a part of all that surrounds them. This stems from the authors' ethics, which include as great an adherence as possible to the following goal:
Respect for the interdependent web of all existence of which we are a part. -- Unitarian Universalist 7th Principle
A study by the University of Michigan appears to indicate that phosphorus levels (which cause algae blooms and kill fish) can be reduced by implementing a city ordinance aimed at home lawn maintenance. Check the link for more information.