Some people think that we must obtain all of our energy from renewable resources. Other people think that it's too late for anything other than moving back to a pre-Industrial Revolution lifestyle right now! Some folks swear by veganism. Some people want to eliminate the internal combustion engine. Other people think that private homes are wasteful and we must all live in energy efficient apartment buildings.
Some are fiercely hostile to private travel. They think that public transportation should not only be subsidized, but mandated. Some folks would ban air travel and outlaw vacations. Other people deny the existence of climate change. They also argue that if climate change exists it's (a) not our fault and/or (b) nothing we can do about at this late point anyway.
People's ideal solutions (or lack thereof) tend to line up with their preferred social values, political ideologies, and economic interests.