Natural gas remains key to Africa’s energy security and economic prosperity, even as political pressure grows to speed up the transition away from fossil fuels, according to the continent’s biggest development bank. “Gas is fundamental to Africa’s energy system,” African Development Bank President Akinwumi Adesina said in an interview with Bloomberg News on Wednesday. “We’ve got to make sure that we’re pragmatic” and that a system is created to support long-term development, he said.