Earth is the home planet, right for life. But rights, a notable politi
cal category, is, unfortunately, a biologically awkward word. Humans,
nonetheless, have rights to a natural environment with integrity. Huma
ns have responsibilities to respect values in fauna and flora. Appropr
iate survival units include species populations and ecosystems. Increa
singly the ultimate survival unit is global; and humans have a respons
ibility to the planet Earth. Human political systems are not well suit
ed to protect life at global ranges. National boundaries ignore import
ant ecological processes; national policies do not favor an equitable
distribution of sustainable resources. But there are signs of hope.