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Wildfire smoke now bigger prenatal threat than human sources of air pollution
野火烟雾正成为孕期空气污染头号威胁，环保法规的成果被悄然吞噬。
Regulations reduced prenatal exposure to harmful emissions, but wildfire smoke is erasing gains.
野火烟雾正成为孕期空气污染头号威胁，环保法规的成果被悄然吞噬。
Regulations reduced prenatal exposure to harmful emissions, but wildfire smoke is erasing gains.
ICCT研究量化显示，美国全面电动化能避免超10万人过早死亡。
Much of it comes from heavy-duty trucks and buses that burn diesel.