Pakistan is planting lots of mangrove forests. Enlarge this image toggle caption Diaa Hadid/NPR Diaa Hadid/NPR KETI BANDAR, Pakistan — Wildlife ranger Mohammad Jamali boats through mangrove forests of the Indus River Delta, the terminus of a curly waterway that begins thousands of miles upstream in the Himalayas. Sponsor Message Delta Blue's carbon credit program works by planting mangroves that …