Water use in the Golden State fell by 27 percent last month, despite it being the hottest June on record globally.
The big question is whether that modest progress on removing fossil fuel subsidies can be locked in. If oil prices rise, there will be a lot of pressure to reinstitute support.
Researchers find the ground below Washington D.C. is rapidly sinking and urge action to alleviate threats to the city's infrastructure.
Smart phones, tablets, laptops, and other consumer electronics demand more lithium. But the largest driver for future lithium use will be in electric vehicles and home batteries for solar panels. That has lithium on the verge a boom for which supply can no longer be taken for granted.
Reported sightings of a lion-like creature roaming the streets of Milwaukee have alarmed some residents, amused others, and intrigued all.
Walter Palmer, the man accused of killing Zimbabwe's beloved lion, Cecil, says he didn't know at the time that what he was doing was illegal.
A renewed downturn in oil prices is sparking pessimism among traders. In recent weeks speculators have taken the most bearish position on oil in years.
Russia is facing a mounting fiscal crisis as the combination of low oil prices and western sanctions continue to take their toll.