It’s not ____ to heat the whole building if only three people are working here. Developing environmentally ____ products and services requires significant research. It was difficult to ____ how many trees had been destroyed. There is a great deal of interest in ____ wind and waves as new sources of power. Once the smoke is released into the air, the wind quickly ____ it. If any of these symptoms ____ while you are taking the medication, consult your doctor immediately. Industrial fishing methods don't give fish stocks a chance to ____. The government has promoted the use of public transport, but has not ____ it with adequate investment in the network. They claim the product can ____ the signs of ageing. The universe is theoretically ____. They have not yet ____ to fully digitial technology. The water is pressurized and ____ through the sand granules in the filter.

Geothermal Energy - Heat Pumps B

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