RON BOUSSO ROYAL Dutch Shell is considering a return to Libya with a plan to develop new oil and gas fields and infrastructure, as well as a solar project, two sources said, a decade after exiting the North African country because of unrest. The plan, details of which were seen by Reuters, marks a rare new oil and gas foray by the energy major as it seeks to cut fossil fuel investment and slash greenhouse gas emissions. In that strategy, Shell still needs some new projects to maintain output as reserves in existing oil and gas fields have rapidly fallen…