Our existence, lifestyles, economies depend upon:
Solar Capital = Sun
Earth Capital = Planet's air, water, soil, wildlife, minerals,
Are we impairing
Can we live more sustainably?
The earth's natural processes developed over billions of years.
We need careful use of ecosystem services.
Two Basic Principles:
1. Energy flow =
One way, need constant input from sun (<1% of
sun for photosynthesis), powers all life.
2. Nutrient Cycling =
Cycles over & over (ie., honc)
Why are ecosystem services
We are all a part of nature
Services constitute earth capital
Support all life, essential to quality of life and all economies.