As you're exploring these resources, check out this helpful resource from our sponsors: AIR for AppUp: What you Need To know.
在看这些资源时，请看下我们赞助商所提供的有用资源：AppUp的AIR：你需要知道什么。
The air is a Shared resource. In order to breathe clean air, we have to have interventions in the areas that pollute air.
空气是共有的资源。为了呼吸干净的空气，我们需要对污染空气的地区采取措施。
The world's most-used natural resource (apart from water and air) is sand - and it's disappearing.
全球用得最多的自然资源(空气和水除外)是沙子，并且沙子正在消失。
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