When driving in a car on a hot summer day, you may see what looks like shimmering water on the road, which, as science tells us, is really just a mirage, an illusion caused by the heating of the air.

在炎热的夏天开车时，你可能会在路上看到闪闪发光的水，但科学告诉我们，这其实只是海市蜃楼，是空气加热造成的幻觉。

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We are installing the hot water heating system.

我们正在安装热水供暖系统。

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This paper states the method of selecting and using circulating pump in hot water heating system properly to save electric energy.

合理的选择和使用热水供暖系统循环水泵，以达到节约电能的目的。

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The 59-acre (24 hectare) site will also boast a solar thermal hot water system to pre-heat the water for the heating system, and a biomass boiler that will provide heat using locally-sourced wood chips.

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Among the energy-saving options, two promising technology switches are the electrification of transportation (electric vehicles can be about four times as energy-efficient as standard fossil-fuel vehicles) and the use of electric-powered heat pumps to deliver winter heating and hot water (heat pumps can be four times as energy-efficient as standard heaters).

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So, even if we drive our vehicles with methane -and use solar thermal for home heating and hot water, we will not increase demand for methane.

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