Vitek VTC-3516 Specifikace stáhnout pdf (Strana 30)

Design and Applied Technology (Secondary 4-6)

A schematic representation of the exchange of energies between outer space, earth's

atmosphere and earth’s surface is shown above. The greenhouse effect is characterized by the

ability of the atmosphere to capture and recycle the energy emitted by the earth surface.

The release of chlorofluorocarbons (CFC’s) from manufactured products leads to atmospheric

ozone layer depletion. The depletion enables the arrival of more harmful ultraviolet (UV)

radiation at the earth. Consequently, cataracts, skin cancers, suppressed immune systems in

humans and reduction of yields of crops happen. To stop worsening the situation, CFC’s are

not (expected not to be) produced any more, and will (are expected to) eventually be

eliminated from products.

Other environmental impacts include:

(a) Noise generation,

(b) Waste disposal, and

For noise pollution, both technologies and traditional methods, such as isolation and enclosure,

can be used to keep it within the lawful limits.

Noise pollution and polluting gas emissions

There are environmental related legislations and directives, such as Restriction of use of

Hazardous Substances (RoHS) and Waste Electrical and Electronic Equipment (WEEE), for

materials and recycling purposes. Such requirements draw attention from designs, engineers,

manufacturers and users to the wastes disposal issues and the importance of recyclable

products. Waste disposal thus can be reduced.

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Vitek VTC-3516 Specifikace Strana 30