[aussiethebob]

I feel like the biggest problem with climate change is one of collective action.

Lets start with the assumption that it is possible to make a meaningful impact on climate change by significantly reducing our consumption, this requires significant sacrifices to an individuals lifestyle.

I'm talking big pictured stuff like not eating meat, no more international travel, no personal vehicles, less spend on medicine reducing life expectancy, limits on number of children.

Lets say we have credible evidence that if these things are done the situation will improve.

Now whether you take the perspective of being an individual, member of a community or even a country, why would you make those sacrifices if you have no guarantee that everyone else will. It's a big price to pay to 'set an example'.