In such cases, the international community should ideally provide the finance, technology transfer and technical support needed for pursuing further decarbonization of LDC power sectors. Similarly, environmental sustainability considerations call for an adequate assessment of the options for the safe disposal or recycling of generation apparatus containing potentially hazardous materials (notably solar panels), or — in the case of large-scale hydroelectricity projects — of their potential social and environmental impact on river-based ecosystems and related communities. While the costs of storage technologies have declined rapidly over the last few years and may make battery storage a feasible option in due course, this is not yet the case in all LDCs (at least not at mini-grid or utility scale).