Waste produced in urban areas, mainly made up of household waste but also some small commercial waste that is similar to household waste.

The mass of air surrounding the Earth.

Short for Building Energy Rating, which says how much energy a home needs for heating, lighting and hot water. Homes are placed on a scale from A to G. A-rated homes need the least amount of energy wh [..]

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Reducing the degree of intensity of , or eliminating, pollution. (Source: US EPA)

A corrosive solution with a Ph of less than 7 (Source: US EPA)

Air is made up of a number of gases, mostly nitrogen and oxygen and, in smaller amounts, water vapour, carbon dioxide and argon and other trace gases. Air pollution occurs when harmful chemicals and p [..]

A measure of the level of pollution in the air.

Simple rootless plants that grow in sunlit waters in proportion to the amount of available nutrients. They can affect water quality adversely by lowering the dissolved oxygen in the water. They are fo [..]

Energy that does not come from fossil fuels (such as coal, oil, gas), for example wind, flowing water, solar energy and biomass.