Renewable resource

A resource that will refill to replace the portion used up by usage and consumption, also known as a flow resource, through natural reproduction or other cyclical processes in a limited length of time on a human time scale These are referred to be permanent resources when the rate of resource recovery is unlikely to ever surpass a human time scale. The natural environment of the Earth and the main elements of its ecosphere are renewable resources. A resource's sustainability may be determined in large part by looking at its life-cycle evaluation. Agricultural output, including agricultural products, and to some extent water resources may also be included in definitions of renewable resources. Paul Alfred Weiss gave this definition of renewable resources in 1962: "The entire range of living species that give man life, fibres, etc. Renewable energy sources are yet another kind of renewable resources. Solar, geothermal, and wind energy are examples of common renewable energy sources. Renewable resources include all three of these. One example of a renewable resource is fresh water.