The Trump administration proposes eliminating a 2009 finding that greenhouse gases endanger people. That would undermine the EPA's climate change regulations for power plants and cars.
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A train carrying lithium-ion batteries, paint and oxygen containers — which can pose a threat to the environment — went off the tracks on Thursday. There's no risk currently, the rail operator says.
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The California Air Resources Board plans to vote on a first-in-the-nation, ambitious rule limiting rail pollution.
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Three orphaned bear cubs, rehabilitated by the San Diego Humane Society's Ramona Wildlife Center, are back in the wild since Wednesday evening.
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Much of the famed valley at California's Yosemite National Park will be temporarily closed starting Friday due to a forecast of flooding as rising temperatures melt the Sierra Nevada's massive snowpack.
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The Sierra Nevada region where the park is located experienced snowfall at over 300% than usual this past winter. Flooding may happen into May and June, the park said.
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Climate activists protested the widening, saying it would not fix congestion but rather put more cars on the road, pushing the city's goal of net zero emissions further from reach.
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On Monday, two local transit agencies announced $100 million in state funding to advance the San Dieguito Bridge replacement.
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San Diego County’s southernmost beach town faces a daunting future as sea levels rise.
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SeaWorld says a sick sea lion has been euthanized after he was rescued last year from wandering on busy San Diego thoroughfares.
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California's year of endless storms has seeded superblooms of wildflowers and provided a boost to some of the state's endangered ecosystems.
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