greenhouse gas emissions greenhouse gas emissions

Vehicles pass during the afternoon commute on Highway 101 in Los Angeles on April 2. California is suing the EPA over a plan to revise fuel efficiency standards for vehicles, weakening Obama-era limits on greenhouse gas emissions. Mario Tama/Getty Images hide caption

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Mario Tama/Getty Images

From field to bakery, a loaf of bread packs a measurable environmental punch. Daniel Berehulak/Getty Images hide caption

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Daniel Berehulak/Getty Images

What's The Environmental Footprint Of A Loaf Of Bread? Now We Know

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