Among them: flowerpots whose color warns when the soil is drying out, blackboards using water instead of chalk that could be erased by a pulse of heat, and even cars that change color in the rain.

其中包括：当土壤正在变干之时，凭颜色发出警告的花盆；用水笔代替粉笔写字，用热脉冲可以擦除字迹的黑板；甚至包括在雨中变化颜色的汽车。

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Study of Effects of the Concrete Mulch on Movement of Soil Water and Soil Heat Transfer.

硬覆盖对土壤水热传输及作物生长发育影响的试验研究。

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Xinjiang is with advantaged resource of water, soil, light and heat.

新疆具有得天独厚的水、土、光、热资源。

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High demand for water amid the heat wave and problems with soil shrinking as the ground warms has resulted in burst pipes and low water pressure in Oklahoma City, prompting officials to issue mandatory water-use restrictions for the first time in at least a decade, according to utilities department spokeswoman Debbie Ragan.

CNN: Heat advisories issued to states dwindles to 15