INTRODUCTION
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Conservation, sustainable use and
protection of natural resources including plants, animals, mineral deposits,
soils, clean water, clean air, and fossil fuels such as coal, petroleum, and
natural gas. Natural resources are grouped into two categories, renewable and
nonrenewable. A renewable resource is one that may be replaced over time
by natural processes, such as fish populations or natural vegetation, or is
inexhaustible, such as solar energy. The goal of renewable resource
conservation is to ensure that such resources are not consumed faster than they
are replaced. Nonrenewable resources are those in limited supply that
cannot be replaced or can be replaced only over extremely long periods of time.
Nonrenewable resources include fossil fuels and mineral deposits, such as iron
ore and gold ore. Conservation activities for nonrenewable resources focus on
maintaining an adequate supply of these resources well into the future.
Natural resources are conserved for their biological, economic,
and recreational values, as well as their natural beauty and importance to
local cultures. For example, tropical rain forests are protected for their
important role in both global ecology and the economic livelihood of the local
culture; a coral reef may be protected for its recreational value for scuba
divers; and a scenic river may be protected for its natural beauty. Conservation conflicts arise when natural-resource shortages develop in the face of steadily increasing demands from a growing human population. Controversy frequently surrounds how a resource should be used, or allocated, and for whom. For example, a river may supply water for agricultural irrigation, habitat for fish, and water-generated electricity for a factory. Farmers, fishers, and industry leaders vie for unrestricted access to this river, but such freedom could destroy the resource, and conservation methods are necessary to protect the river for future use.
Conflicts worsen when a natural resource crosses political boundaries. For example, the headwaters, or source, of a major river may be located in a different country than the country through which the river flows. There is no guarantee that the river source will be protected to accommodate resource needs downstream. In addition, the way in which one natural resource is managed has a direct effect upon other natural resources. Cutting down a forest near a river, for instance, increases erosion, the wearing away of topsoil, and can lead to flooding. Eroded soil and silt cloud the river and adversely affect many organisms such as fish and important aquatic plants that require clean, clear freshwater for survival.
Forest conservation
Forests provide many social,
economic, and environmental benefits. In addition to timber and paper products,
forests provide wildlife habitat and recreational opportunities, prevent soil
erosion and flooding, help provide clean air and water, and contain tremendous
biodiversity. Forests are also an important defense against global climate
change. Through the process of photosynthesis, forests produce life-giving
oxygen and consume huge amounts of carbon dioxide, the atmospheric chemical
most responsible for global warming. By decreasing the amount of carbon dioxide
in the atmosphere, forests may reduce the effects of global warming.
However, huge areas of
the richest forests in the world have been cleared for wood fuel, timber
products, agriculture, and livestock. These forests are rapidly disappearing.
The tropical rain forests of the Brazilian Amazon River basin were cut down at
an estimated rate of 14 million hectares (35 million acres) each year—an area
about the size of the state of Wisconsin—in the 1990s. The countries with the
most tropical forests tend to be developing and overpopulated nations in the
southern hemisphere. Due to poor economies, people resort to clearing the
forest and planting crops in order to survive. While there have been effective
efforts to stop deforestation directly through boycotts of multinational
corporations responsible for exploitative logging, the most effective
conservation policies in these countries have been efforts to relieve poverty
and expand access to education and health care.
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