In light of the considerable increase in generation capacity that will be needed to achieve transformational energy access in LDCs, it would make little sense to decommission existing capacity or forgo related investment plans where these remain viable, irrespective of the technology used. It may, however, be desirable to improve or upgrade existing capacity to increase its efficiency and reduce greenhouse gas (GHG) emissions intensity (IPCC, 2014). As discussed in chapter 5, investments in electricity infrastructure have very long life cycles, which makes an appropriate and forward-looking choice of technologies for new capacity critical.