The fan can change the environment temperature without environment pollution caused by chemical cooling agent.
没有化学制冷剂对环境的污染；
As a new and renewable energy, solar energy is clean to the environment without pollution.
作为新能源和可再生能源的重要组成部分的太阳能，是对环境不产生污染的洁净能源。
As a new and renewable energy, solar energy is clean to the environment without pollution.
作为新能源和可再生能源的重要组成部分的太阳能，是对环境不产生污染的洁净能源。
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