Water-holding capacity is defined as the water retained between field capacity and wilting point. Field capacity is the saturated state of water in the soil that can drain freely due to the force of gravity. Wilting poin... More »

Solar radiation heats land faster than water for multiple reasons, including the higher heat capacity of water, water's reflectivity and the more absorbent, textured surface of the earth. Water reflects solar radiation, ... More »

The term "global environment" refers to Earth's environment in general. Many environmental issues primarily affect local and national areas. Others deal with problems that face the entire planet. More »

An algal bloom, also known as a marine or water bloom, is a dramatic upsurge in the population of aquatic microbes. This often happens in response to changes in ocean or lake chemistry, such as the introduction of fertil... More »

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Alternative energy is a substitute source of power that has equivalent or superior performance compared to existing technologies but do not exhaust fossil fuel or release carbon dioxide. These alternatives are renewable,... More »

Sandy soil is soil comprised of particles that are larger than 0.05 millimeters and smaller than 2 millimeters. Sandy soil retains little water and aerates well because of the large size of its particles. More »

Ecological balance is a stable state between all plants and animals in an ecosystem, and destabilization of the stable state is ecological imbalance. When plants and animals share a particular habitat, balance must be ma... More »