07 May ENVIRONMENTAL SUSTAINABILITY
To understand while the need to sustain the environment we must first define what sustainability is. Sustainability is the ability to continue a defined behavior indefinitely.
According to Herman Daly, one of the early pioneers of ecological sustainability, he looked at the problem from a maintenance of natural capital viewpoint and in 1990 he proposed that
1. For renewable resources, the rate of harvest should not exceed the rate of regeneration (sustainable yield);
2. [For pollution] The rates of waste generation from projects should not exceed the assimilative capacity of the environment (sustainable waste disposal); and
3. For nonrenewable resources the depletion of the nonrenewable resources should require comparable development of renewable substitutes for that resource.
Therefore, Environmental sustainability is the rates of renewable resource harvest, pollution creation, and non-renewable resource depletion that can be continued indefinitely. If they cannot be continued indefinitely then they are not sustainable.