India is the fastest-growing mobile communications market in the world. The rural poor are rapidly adopting phones, so the technology could become a platform for providing banking services. Sanjay Swamy, CEO of the mobile-payment platform mChek, talks about the potential.
Five billion aluminium drink cans are sold in the UK every year and each one could be recycled over and over again, saving energy, raw materials and waste.
Across the globe, as mining and oil firms race for dwindling resources, indigenous peoples are battling to defend their lands - often paying the ultimate price