Should we, as some scientists have suggested, spend our environment budgets on painting the world's roofs white or filling the Sahara with solar panels?
The mural is depending on art of building. It is important form of an environment art, is also an one of the painting whose history is most long forms.
壁画是依附建筑物的艺术形式是环境艺术的重要组成部分，也是历史最悠久的绘画形式之一。
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It can be in a single environment to complete a single form of painting no matter it is the abstract or the impression, even realistic.