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In combusion, solid residue that remains after waste has been completely burned. SOURCE: MINNESOTA POLLUTION CONTROL AGENCY

Area sources are smaller sources of air emissions that are not required to submit criteria pollutant data to the MPCA. Examples of area sources include gas stations, dry cleaners and auto body shops. Individually, these sources do not emit much air pollution, but collectively release large amounts of one or …

An organism group of interacting populations in a given waterbody, for example, fish assemblage or a benthic macroinvertebrate assemblage. SOURCE: MINNESOTA POLLUTION CONTROL AGENCY

1. (CSMP) Each day that you sample, please record the one number that best describes the appearance of stream water within one meter of your sampling site. 1A = Clear – crystal clear, transparent water 1B = Tea-colored – transparent water, which has been colored by dissolved organic matter from …

A unit of measure used to compare different types of animals. This measure is calculated by multiplying the number of animals by their average weight and dividing by 1000: AU = (w * n)/1000 where w is the average weight of the animals and n is the number of animals. …

The state of quality of the air in the surrounding environment. SOURCE: MINNESOTA POLLUTION CONTROL AGENCY

Any unconfined portion of the atmosphere: open air, surrounding air. Source: World Bank

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The California Integrated Waste Management Board (CIWMB) has published two interesting consultation draft reports exploring plastics which can be composted or degraded. Degradable Plastics Study (still under consultation) CIWMB launched a study on June, 2005 on degradable products (those not specifically designed to degrade in a compost facility per ASTM …