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ClimateWire will not be published the week of Aug. 25-29. It returns Tuesday, Sept. 2.

ClimateWire headlines —

SPOTLIGHT

1. SCIENCE:

Researchers penetrate one of the darkest mysteries of climate change -- clouds

Deadening calm fills the Horse Latitudes, where there's ocean, sky and little else. A satellite peers down, capturing wisps of cloud, counting particles suspended in the air, measuring rainfall and monitoring weather. These windless tracts, between 30 and 35 degrees away from the equator, have yielded new information relevant to climate science: Few clouds used to populate our skies before the Industrial Revolution, and pollutants spewed by factories since then have vastly increased the cloudiness of our atmosphere.

2. REGULATION:

Questions of jurisdiction, responsibility may foreshadow legal trouble for new EPA power plant rule

U.S. EPA's proposed rule for power plant carbon gives states wide latitude in controlling their emissions, embracing fuel switching, renewable energy and energy efficiency as building blocks on the path to carbon reduction. Given the pervasiveness of carbon dioxide as the result of modern power generation, that "all of the above" approach will be needed to meet the agency's stringent reduction targets, experts say.

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