1. You can check the suppliers here: https://utopia.de/ratgeber/oekostrom-tarife-vergleich/ Verivox in Germany for example also has the option "öko plus" to check.

2. I think, I have been very unsuccesful at debating. Many people do not want to change or rather trade freedom now against climate fuckup in the future. It is very frustrating. In my opinion, most people still do not have realized that we have to act now and not in 5 years. In Germany, we already have 2°C, climate change is reality. :(

3. Not really.