Sustainability based on ecosystem processes. 1. A recycling of elements 2. Sunlight as a source of energy 3. Carrying capacities are realized and maintained 4. Biodiversity is maintained. 1. A recycling of elements.
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a. change the one-directional flow characteristic of pollution streams to a cycling and recycling of nutrients.
b. recycling will improve soil health and stability.
c. e.g. organic farming, green manuring, not using animal dung as a fuel, green belts or fences along streams, minimum or no-till cultivation, contour plantings etc.
a. the increase in mechanization is connected to the limited capacity of the bioshpere to absorb waste byproducts from fossil fuel burning.
b. e.g. urban smog, acid rain, global warming, fear of crude oil depletion
c. Alternative like wind and solar power and animal power when appropriate.
d. using the front yards to grow fruits and vegetables instead of lawns.
a. maintaining a suitable standing biomass to assure future production while confronted with increasing per capita consumption, losses in biodiversity, rainforest destruction, overfishing, etc.
b. Thermodynamic considerations.
c. Pest management: not all of them pests are bad but sometimes eradication methods can’t tell the difference between the good, bad, and ugly.
a. crop rotations:changing the crops to green manure, nitrogen fixation, pest control, disease control, agroforestry, energy plantations, beans and corn, a buffer against economic considerations
b. plant breeding that maintains a large germ plasm base:elimination of monocultures.
1. Is it consistent with principles of sustainability
2. Are the introductions controllable, harmful etc.
Cultural control of pests affecting humans.
Cultural control of pest affecting lawns, gardens, etc.
Use of parasitoids
changes the flow of energy and cycling of nutrients by changing the list of who eats who