; (B) identifies the remaining challenges in achieving carbon sequestration that is reliable and safe for the environment and public health; and (C) creates a roadmap for Department of Energy carbon storage research and development activities through 2030 with the goal of reducing economic and policy barriers to commercial carbon sequestration. (5) Large-scale carbon sequestration For purposes of this subsection, large-scale carbon sequestration means a scale that demonstrates the ability to inject and sequester several million metric tons carbon dioxide for at least 10 years. (d) Integrated storage projects The Secretary may carry out a program for the purpose of transitioning the large-scale carbon sequestration demonstration projects under subsection (c) into integrated, commercial storage complexes. The program shall focus on— (1) qualifying geologic storage sites in order to accept large volumes of carbon dioxide acceptable for commercial contracts; (2) understanding the technical and commercial viability of storage sites; (3) developing the qualification processes that will be necessary for a diverse range of geologic storage sites to commercially accept carbon dioxide; and (4) any other activities the Secretary determines necessary to transition the large scale demonstration storage projects into commercial ventures. (e) Cost sharing The Secretary shall require cost sharing under this section in accordance with section 988. (f) Authorization of appropriations For activities under this section, there are authorized to be appropriated to the Secretary— (1) $120,000,000 for fiscal year 2020; (2) $126,000,000 for fiscal year 2021; (3) $132,300,000 for fiscal year 2022; (4) $138,915,000 for fiscal year 2023