30-40% of Denmark's power is still fossil fuels, and another 10-15% is imports from neighbors when the wind isn't blowing.
source: https://en.wikipedia.org/wiki/Electricity_sector_in_Denmark#...
Also, RE Bio & waste emit CO2 - they are not particularily clean.
source: https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1757-1707....