Energy conservation'' means to reduce the quantity of energy that is used for different purposes. This practice may result in increase of financial capital, environmental value, national and personal security, and human comfort. Individuals and organizations that are direct consumers of energy may want to conserve energy in order to reduce energy costs and promote economic, political and environmental sustainability. Industrial and commercial users may want to increase efficiency and thus maximize profit.
Water conservation encompasses the policies, strategies and activities to manage fresh water as a sustainable resource, to protect the water environment, and to meet current and future human demand. Population, household size and growth and affluence all affect how much water is used. Factors such as climate change will increase pressures on natural water resources especially in manufacturing and agricultural irrigation
Fossil fuels are materials that are non-renewable such as oil, gas and coal. Aside from causing local air pollution from polluting particulates, the burning of fossil fuels releases carbon dioxide into the atmosphere, which is a greenhouse gas that contributes to climate change. Moreover, many fossil fuels are reaching their "peak" (oil being the most rapidly depleted).
Saving electricity becomes an increasingly important issue the more the cost of power increases. There is no such thing as cheap electricity. That is a basic fact in today's world of increasing costs for all forms of energy. It's a common fact that vast amounts of electric power are wasted every year in the world, mostly in areas where power is cheap and abundant.