They aren't suing the German Government because they say it's responsible for Global Warming, they're suing because the German Government publicly announced Goals for CO2 reduction till 2020 by 40% which they failed to deliver by a wide margin.
By the way the scientific consensus is that CO2 is the biggest contributor to global Warming, proven time and time again.
By the way the scientific consensus is that CO2 is the biggest contributor to global Warming, proven time and time again.