An argument for conservation of nature on the grounds that nature is beautiful and valuable to people.
The maximum abundance of a species that can be maintained by an ecosystem.
An argument for the conservation of nature that species, communities, or Earth's biospehre provides necessary functions.
Life affects the environment at a global level.
Urban areas with at least 8 million inhabitants.
An argument for the conservation of nature that aspects of the environment have a right to exist.
The idea that we should take cost-effective measures to solve
Management of natural resources with goals of allowing the harvest of resources to remain at or above some specified level.
An argument for the conservation of nature on the grounds that it provides individuals with with direct economic benefit.