It only takes a small percentage of the population to make a systematic change[0], I hope for humanity we are reaching a tipping point on this. People living their life in the correct way is spreading awareness and they are putting their money where their mouth is. These people and the youth climate strike may be our last chance. Also, the environment is the number one issue for the democratic party in the 2020 election. But, I do agree eventually these people making these changes will have to drive government agendas and the real mass changes will have to happen that way.
[0]http://www.bbc.com/future/story/20190513-it-only-takes-35-of...