If you add enough insulation to your house, you may be able to________.

A．improve your work environment

B．cut your utility bills by half

C．get rid of air-conditioners

D．enjoy much better health

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1 How much of the power consumed by incandescent bulbs is converted into light？

A．A small portio

B．Some 40 percen

C．Almost hal

D．75 to 80 percen

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2 Some countries have tried to jump-start the market of heat pumps by________.

A．upgrading the equipment

B．encouraging investments

C．implementing high-tech

D．providing subsidies

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3 German chemicals giant BASF saves 200 million a year by________.

A．recycling heat and energy

B．setting up factories in China

C．using the newest technology

D．reducing the CO2 emissions of its plants

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