Rocks, once a hindrance since they reduced arable land, have become an asset. Pedrina Pereira and João Leite used them to build four ponds to collect rainwater in a farming community in Brazil’s semi-arid Northeast.

Despite having the strong support of influential global leaders, Bangladesh has “missed” the opportunity to mobilise the world’s superpowers and place pressure on Myanmar to allow for the repatriation of the Rohingya refugees.