Each day, try giving kids one hour of unstructured play in the natural world, suggests the National Wildlife Federation, an advocacy group.
自然野生动物联合会(一个倡导性的组织)建议每天尽量让孩子在大自然中自由玩耍一个小时。
If you want to create a listening dashboard, read how the National Wildlife Federation creates and monitors its amazing (free) listening system here.
如果你想要创造一个传播的仪表板，就要在这里阅读国家野生动物联盟是如何建立和监督它的令人惊异的免费的监测系统。
The findings correlate with analysis last year by the National Wildlife Federation that found ragweed growth rates and pollen counts increased with global warming.
这些发现是基于去年国家野生动物联合会豚草的生长速度和花粉数量随着全球变暖增加的分析得出的。
The findings correlate with analysis last year by the National Wildlife Federation that found ragweed growth rates and pollen counts increased with global warming.
这些发现是基于去年国家野生动物联合会豚草的生长速度和花粉数量随着全球变暖增加的分析得出的。
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