size of the population or community that can be supported by the resources available in the ecosystem is reffered to as :
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Mineral and Fossil-Fuel Conservation
Mineralsandfossil fuelsare nonrenewable resources. Once exhausted, they can never be replaced. The United States has valuable stores of coal, oil, natural gas, and minerals. Until the U.S. Mineral Leasing Act was passed in 1920, the resources on public lands were transferred to private individuals, who sometimes exploited them. Today, in many countries worldwide, including the United States, government regulation attempts to assure that private industry makes proper use of these resources. In some countries, the government itself operates key mining industries.
Limited Supply
For yearscoalwas mined as though it were inexhaustible—about one ton wasted for each ton mined. Various government agencies have promoted more efficient mining methods. In addition, the use of other sources of energy in home construction and in industry, and to generate electricity, has greatly extended the life of the coal supply.Natural gasandpetroleumwere once carelessly wasted also. In earlier days, for example, because no use for natural gas had been found, it was burned off or allowed to escape into the air.
Like other conservation needs, the wise management of mineral resources has become more pressing because of the growing number of consumers. As the human population increases, the demand increases for more consumer goods, such as household appliances and automobiles. Manufacturers meet these rising demands from already dwindling deposits of metal ore and fuels.
Some mineral resources, particularly metals, may berecycledso that they can be salvaged and reused. The recycling of waste metals is an important conservation practice that has become a major business. It is known as secondary production. Conservation programs for fossil fuels include reducing their use, such as by replacing them with more abundant and cleaner sources of energy.
Mineralsandfossil fuelsare nonrenewable resources. Once exhausted, they can never be replaced. The United States has valuable stores of coal, oil, natural gas, and minerals. Until the U.S. Mineral Leasing Act was passed in 1920, the resources on public lands were transferred to private individuals, who sometimes exploited them. Today, in many countries worldwide, including the United States, government regulation attempts to assure that private industry makes proper use of these resources. In some countries, the government itself operates key mining industries.
Limited Supply
For yearscoalwas mined as though it were inexhaustible—about one ton wasted for each ton mined. Various government agencies have promoted more efficient mining methods. In addition, the use of other sources of energy in home construction and in industry, and to generate electricity, has greatly extended the life of the coal supply.Natural gasandpetroleumwere once carelessly wasted also. In earlier days, for example, because no use for natural gas had been found, it was burned off or allowed to escape into the air.
Like other conservation needs, the wise management of mineral resources has become more pressing because of the growing number of consumers. As the human population increases, the demand increases for more consumer goods, such as household appliances and automobiles. Manufacturers meet these rising demands from already dwindling deposits of metal ore and fuels.
Some mineral resources, particularly metals, may berecycledso that they can be salvaged and reused. The recycling of waste metals is an important conservation practice that has become a major business. It is known as secondary production. Conservation programs for fossil fuels include reducing their use, such as by replacing them with more abundant and cleaner sources of energy.
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