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The branch of science in which the balance among the interactive relationship of living beings and surroundings is studied is called ecology.

Some applications associated with ecology are soil conservation, land utilization, agriculture, pollution, natural resource management, and human social interaction.

In biology and ecology, the available supply of valuable environmental substances on earth that satisfies the needs of living beings is called resources.

The natural (resources that nature gifts in larger quantities and utilized by people without alteration) and human or man-made (resources that humans make from natural resources) resources are classified as two different kinds of resources found on earth.

The natural resources examples are sun, forest, animals, soil, air, rock, crude oil, and water resources. Human-made resources are roads, vehicles, machinery, money, metals, papers, rubber, and brass.

Interdisciplinary fields, such as environmental science, define ecological footprint as a scientific concept that tells about the land, water, and resources that individuals demand from nature to support their lifestyle.

The calculation of ecological footprint determines its influence on an individual鈥檚 life. One can make choices of demand from nature like the amount of food supply and consumption, energy utilization, number of children, and amount of waste generation to reduce the ecological footprint.