因为传统的黑柏油屋顶在夏天的时候会吸热，加重了空调的负荷。
Because traditional black asphalt roofs heat up in summer and strain the air conditioners.
一位91岁的德国老翁在修补屋顶时，不慎失足滑倒，“像一只仰卧的甲虫一样”牢牢地卡在了屋顶的柏油上。之后，警方开始了救援行动。
A 91-year-old German sparked a rescue operation when he slipped mending his roof and got stuck fast in tar "like a beetle on its back".
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