by Hannah Ritchie June 04, 2021 Our World in Data presents the data and research to make progress against the world’s largest problems.This blog post draws on data and research discussed in our entry on Energy. Many thanks to Micah Ziegler and Jessika Trancik for providing feedback on this article. To reduce global greenhouse gas emissions … Continue reading The price of lithium-ion batteries has declined by 97% since 1991