I'm really excited about space flight and wish we could make it to Mars already, build space colonies etc. At the same time I'm also very excited about electric

I'm really excited about space flight and wish we could make it to Mars already, build space colonies etc. At the same time I'm also very excited about electric vehicle and hope we can replace all combustion engines with clean, sustainable, electric drives. Of course this goes had in hand with green energy sources. So at times I try to consolidate these views and struggle with it. What's going to be the carbon impact of ordinary people going to space? Or worse what's the carbon impact of following Musk's vision of using BFR for super quick international travel? I can only imagine it to be catastrophic.