In order to create an environmentally friendly and safe world, it is necessary for each country to set vehicular quotas and limit the permits in number to control regional air pollution.
为了创造一个有益于环保和安全的世界，每个国家都有必要定出汽车限额，并限制发放许可证的数量，以控制地区的空气污染。
Because they can be tuned across the whole spectrum they might provide a safe and environmentally friendly replacement for pigments in paint.
因为它们可以协调整个频谱，可提供一种安全且环保涂料替代颜料。
Selecting safe and environmentally-friendly management options, to protect people from hazards when collecting, handling, storing, transporting, treating or disposing of waste.
选择安全和有益于环境的管理方法，以便在收集、搬运、储存、运输、处理或处置废物时防止人员受到危害。
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