As one of the green materials and environment-friendly materials, iron oxide is nontoxic and unpolluted. It is important in varies of fields.

铁氧化物作为一种无毒、无污染的绿色环保材料，在许多领域有着重要的应用。

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Dangerous materials are harmful to people's health and the environment.

危险材料对人体健康和环境有害。

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This environment encouraged a free interchange of ideas, which led to more creativity with form, function, colour and materials that revolutionised attitudes to furniture design.

这种环境鼓励了思想的自由交流，从而在形式、功能、颜色和材料方面产生了更多的创意，彻底改变了人们对家具设计的态度。

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Some European regulations will have to be altered in order to ensure the efficient use of energy, water and raw materials, and to protect the natural environment.

FORBES: Sad Stupidity at the European Commission

Her work will focus on studying the fate of toxic and radioactive materials in the environment.

UNESCO: 2011 UK and Ireland Winners

Frugal often also means being sparing in the use of raw materials and their impact on the environment.

ECONOMIST: The charms of frugal innovation