"Global coal consumption rose 3 percent in 2013, despite efforts in some places to scale back use of the carbon-heavy fuel. Why is it hard to stop depending on coal for energy?"

"Skeptics of the plan to build a massive ice wall around Japan’s crippled Fukushima Daiichi nuclear facility didn’t have to wait particularly long for their first 'I told you so.'"

"BAGHDAD — Sunni militants have hung their black banners on watch towers at Iraq's largest oil refinery, a witness said Thursday, suggesting the vital facility had fallen to the insurgents in control of vast territories across the country's north. A top Iraqi security official, however, said the government still held the facility."

"SANTA CRUZ, Bolivia – 'The fate of billions of poor people and the state of the planet depend on the success of our efforts,' UN Secretary-General Ban Ki-moon told leaders of the Group of 77 and China at their summit meeting Sunday in Santa Cruz."

"A Princeton University study has found that leaks from abandoned oil and gas wellbores pose not only a risk to groundwater, but represent a growing threat to the climate."

"ISIS attacks in Iraq have sent oil prices soaring and cast further doubt on long-term growth in Iraq's oil sector. As recently as February, oil production in Iraq was booming -- a sign of economic progress that traders worry will be reversed."

"Somewhere in China, a man typed his user name, 'ghost,' and password, 'hijack,' and proceeded to rifle the computers of a utility in the Northeastern U.S."

"NEW YORK — The world oil market has set up quite nicely for OPEC. Dramatic changes in oil production around the globe are balancing each other out instead of wreaking havoc. This has helped world oil prices stay high enough to provide OPEC countries with robust income, but not so high that they scare customers away from buying more of their precious product."

"Scientists have created mosquitoes that produce 95% male offspring, with the aim of helping control malaria."