How to stop climate change while expanding energy production is one of the biggest challenges in global development. Doing so requires all kinds of improvements in efficiency – from reducing the amount of electricity lost in transmission to better motors and lightbulbs. But, as demonstrated by recent efforts in the Pentagon, changes to how people work may be the lowest hanging fruit.

“We don’t know the reason for the death of fish in downstream villages,” Hamberton Nongtdu, a mine owner from the northeastern Indian state of Meghalaya, told me.

On the heels of a landmark U.S.-China climate agreement, 2015 will be a critical year for China’s environmental and energy policy. A revised and much stricter Environmental Protection Law went into force on January 1; new amendments to the Air Pollution Law are likely to be put in place; and the National Development and Reform Commission will draft a new five-year plan.

One in five African states produce hydrocarbons, and most of these are heavily dependent on oil and gas revenues to finance their governments and generate foreign exchange. Further, an emerging group of East African states are waiting on international oil companies to develop new oil and gas reserves. But Africa’s record using non-renewable oil and gas resources to trigger economic and social development is poor – and plummeting prices may portend more instability to come.

It’s been 14 years since the UN Security Council adopted Resolution 1325 acknowledging women as important agents of change in recovery from conflict and peacebuilding generally. But between 1992 and 2011, only four percent of signatories in 31 major peace processes around the world were women, and only 12 out of 585 peace agreements referred to or made provisions for women’s needs in the reconstruction process.

To stop and perhaps one day reverse climate change requires changes big and small. Despite the thousands of power plants burning coal and other fossil fuels today, nearly 3 billion people still depend on solid fuels, such as wood, dung, and crop residues, for their daily energy needs.

Despite some critics, the recent U.S.-China agreement over carbon emissions has sparked remarkable optimism in global climate negotiations. It’s also opened the door to new bilateral engagement between the U.S. and Chinese environmental communities on other issues, including China’s massive air pollution problems (16 of the world’s 20 most polluted cities are in China).