Prof. Dr. Lisa Fröhlich: The easiest way to more sustainability, and thus climate protection, is lockdown - you might think. We still remember the beautiful photos from Venice, where the dolphins dared to enter the city or the blue skies above China's industrial regions. Except that a lockdown is not the solution. Corona can't stop climate change. At the peak of the lockdown in April and May 2020, CO2 emissions did drop by 26 percent. But even that won't be enough; according to the United Nations UNEP study, a global greenhouse reduction of 55 percent from 1990 levels is needed to mitigate climate change. Even the global lockdown "experiment" ultimately failed to help achieve sustainability goals. Germany did achieve its self-imposed climate targets in 2020 "thanks" to the lockdowns, among other things through lower energy consumption and less traffic, but this was accompanied by an economic slump. That can't be a lasting solution.