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Climate and Environment

Air Pollution Is Fertilizing Invasive Grasses In Our Hills, Making Wildfires Worse

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Dry grasses partially cover a fire danger sign in Lagunitas (Justin Sullivan/Getty Images)
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Drive down any of our freeways that snake along our gorgeous golden hills and you may be forgiven for appreciating how beautiful they look.

But the flowing grasses that cover them are invasive species, flammable in wildfires.

And you're helping those grasses grow, simply by driving your gas-powered car.

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