Environmental Pollution Essay - 646 Palabras | Cram
Clean-up has a common sense meaning, as when an employer is required to clean up his act, which can mean a large number of different things. Within environmental protection, clean-up is a technical term meaning a branch or a mode of remediation. Even within this restricted use of the term, clean-up can mean (1) the removal of pollutants from a contaminated site or (2) the rehabilitation of a site so that it is restored to its full use-potential. Again, clean-up sometimes refers to nothing more than the containment of pollutants within a site, area or body of waterfor example, by capping, sealing or the construction of an impermeable floor.
pollution essay | Pollution | Environmental Science
Air quality management aims at the preservation of environmental quality by prescribing the tolerated degree of pollution, leaving it to the local authorities and polluters to devise and implement actions to ensure that this degree of pollution will not be exceeded. An example of legislation within this approach is the adoption of ambient air quality standards based, very often, on air quality guidelines (WHO 1987) for different pollutants; these are accepted maximum levels of pollutants (or indicators) in the target area (e.g., at ground level at a specified point in a community) and can be either primary or secondary standards. Primary standards (WHO 1980) are the maximum levels consistent with an adequate safety margin and with the preservation of public health, and must be complied with within a specific time limit; secondary standards are those judged to be necessary for protection against known or anticipated adverse effects other than health hazards (mainly on vegetation) and must be complied within a reasonable time. Air quality standards are short-, medium- or long-term values valid for 24 hours per day, 7 days per week, and for monthly, seasonal or annual exposure of all living subjects (including sensitive subgroups such as children, the elderly and the sick) as well as non-living objects; this is in contrast to maximum permissible levels for occupational exposure, which are for a partial weekly exposure (e.g., 8 hours per day, 5 days per week) of adult and supposedly healthy workers.
Pollution control measures cannot eliminate pollution; all they can do is to mitigate its effects on the environment. Control measures are instituted at the end of the (waste) pipe. The usefulness of control measures will depend on the pollutant and the industrial circumstance. The main methods of pollution control, in no particular order, are:
Pollution Essay | Pollution | Natural Environment
Water pollution refers to the qualitative state of impurity or uncleanliness in hydrologic waters of a certain region, such as a watershed. It results from an occurrence or process which causes a reduction in the utility of the earths waters, especially as related to human health and environmental effects. The pollution process stresses the loss of purity through contamination, which further implies intrusion by or contact with an outside source as the cause. The term tainted is applied to extremely low levels of water pollution, as in their initial corruption and decay. Defilement is the result of pollution and suggests violation or desecration.
Read this essay on Environmental Pollution
This article is intended to provide the reader with an understanding of currently available technology for approaching water pollution control, building on the discussion of trends and occurrence provided by Hespanhol and Helmer in the chapter Environmental Health Hazards. The following sections address the control of water pollution problems, first under the heading Surface Water Pollution Control and then under the heading Groundwater Pollution Control.
Essay on the Prevention and Control of Pollution
The ultimate goal in the control of water pollution would be zero discharge of pollutants to water bodies; however, complete achievement of this objective is usually not cost effective. The preferred approach is to set limitations on waste disposal discharges for the reasonable protection of human health and the environment. Although these standards may vary widely in different jurisdictions, use designations for specific bodies of water are commonly the basis, as briefly addressed below.
Environmental Pollution Essay Examples | Kibin
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