Can land rights for farmers save Ghana's cocoa sector?
The industry regulator has encouraged farmers to clear away old trees but under traditional agreements, a farmer's land rights are tied to the crops he is growing
Mexican wave: harnessing the Pacific’s blue rollers for green energy
Harvesting energy from waves has long lagged solar and wind - but the technology is gaining ground
The path to climate cooperation
The hardest climate problem is not CO2, or fossil fuels, or rising seas. The hard nut to crack is getting people to cooperate
Africa's forests at risk if indigenous 'rebels' excluded - experts
Indigenous communities can prove useful allies if brought on board with programmes to plant and safeguard trees
Smart devices - a new tool for domestic abuse
Nearly 1,000 cases of abuse in Britain this year involved devices such as home hubs, smart TVs and fitness trackers
Refugee charities call Polish reality TV show 'poverty porn'
The show follows six Poles as they travel to Iraq via the Balkans, stopping en route to meet asylum-seekers going the other way
US Open accused of sexism over player baring her bra
Male competitors at the U.S. Open have been photographed topless in courtside chairs
Mini power grids bring promise of jobs to rural Nigerians
Minigrids give rural businesses a cheaper, more reliable alternative to the diesel generators people use now to power everything from sawmills to barbershops
UK's May pledges to help Nigeria get tougher on human trafficking
Nigerian anti-trafficking officials welcomed the plans but called for more joint investigations between the nations
UN accuses Nicaragua govt of widespread rights violations
Some protesters were raped with rifles and tortured in detention