You will find your answer in this article which Malcolm wrote recently. You should really join slack or the telegram communities to keep up with what is taking place instead of leaving yourselves in the dark and making assumptions.

https://medium.com/geekculture/gulden-energy-consumption-an-honest-comparison-to-bitcoin-5c32cdac9793

It's a great read about how green Gulden is compared to bitcoin, it was good timing especially with eyes on energy consumption that bitcoin uses and with Gulden you are getting superior security at the same marketcap for far less energy consumption.