Reuters: Technological innovation is key to helping African farmers cope with the increasing challenges posed by climate change, say specialists. "Temperatures have increased and the danger is that agriculture is the backbone of [Africa’s] economies," Lindiwe Majele Sibanda, chief executive officer of the South-African based Food, Agriculture and Natural Resources Policy Analysis Network (FANRPAN) [http://www.fanrpan.org/], told IRIN. "The increase in temperatures means we have less water in …