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Design and Applied Technology (Secondary 4-6)

1.4.3 Sustainable development: Clean Technology

Due to legislative requirements, customers’ and other pressures as well as the realization of

the importance of sustainable development to the future, the business world is increasingly

adopting clean technology. Clean technology includes

(a) Renewable energy, such as wind power, solar power, biomass, hydropower and biofuels;

(b) Information technology;

(d) Green electric motors;

(e) Right-intensity and power-saving lighting; and

(f) Many other appliances that are now more energy efficient.

Such technology is applicable to raw materials, utilities, process, products and wastes. Using

renewable materials and energy sources are expected to help reduce wastes and minimizing, if

not eliminating, emissions.

Electrical energy has facilitated economic growth and enhancement of living quality for

human beings very much. Its generation by traditional fossil fuels however brings along with

pollutants for the environment, such as air and water. Similarly, vehicle engines provide

human beings, in addition to transportation convenience, with polluting gases through the

chemical-mechanical energy conversion.

Clean technology seems to be an exit of such dilemmas: using wind power, solar power,

hydropower, biofuels, etc to replace ‘dirty’ fuels, such as petroleum and coal. It should be

however noted that clean technology may have its own limitations at the same time. For

example, the power and energy generated from batteries are considered ‘clean’. The disposal

of batteries creates environmental-unfriendly wastes.

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