http://nature.com/articles/doi:10.1038/ncomms13728 http://nature.com/articles/doi:10.1038/ncomms13728 As a result, we show a break-even between the cumulative

http://nature.com/articles/doi:10.1038/ncomms13728 http://nature.com/articles/doi:10.1038/ncomms13728 As a result, we show a break-even between the cumulative disadvantages and benefits of photovoltaics, for both energy use and greenhouse gas emissions, occurs between 1997 and 2018, depending on photovoltaic performance and model uncertainties.