A satellite image from Monday shows Hurricane Florence as it travels west and gains strength in the Atlantic Ocean. Hurricanes Isaac and Helene have also formed off the coast of West Africa.
Solar panels are mounted on the roof of the Los Angeles Convention Center on September 5. The state's governor has signed a landmark bill setting a goal of 100 percent clean energy for the state's electrical needs, by the year 2045.
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Petrochemical facilities in the Houston area are assessing their hurricane preparedness after Hurricane Harvey. This oil refinery reinforced storage tank roofs with geodesic domes — the gray caps on some of the white tanks in the photo — to better withstand a deluge.
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As the climate warms, drought is killing large numbers of trees in California. Scientists are looking to the past to try to understand how the ecosystems of today may be changing.
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Nicolas Hulot, the French environmental minister, departs a weekly Cabinet meeting in Paris in February. "I don't want to give the illusion that my presence in government means we're answering these issues properly," Hulot said in resigning Tuesday.
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Mario Ramos (left) and wife Tally adjust their umbrellas in Laguna Beach, Calif. The state was among a number of places this summer that experienced their highest temperatures on record.
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The Garzweiler coal mine and power plant near the city of Grevenbroich in western Germany. Plans to expand an open-pit brown coal mine in the eastern German village of Pödelwitz have prompted protests.