Denial of anthropogenic climate change is probably mistaken - specious arguments to defend inaction. A warming planet is just one anthropogenic abuse. Over fishing, pollution, deforestation, consumption of limited minerals, to name but a few.
A universal intent to moderate human behaviours creating a stable, sustainable environment is needed, but unlikely. The first world can (and should) change, those less fortunate understandably aspire to adequate food, clean water, shelter, and material wealth enjoyed by the prosperous.
It may matter little whether one personally believes or denies - it will make little difference to the outcome. Record high temperatures in the UK recently would be unremarkable in many places and caused only limited problems - in the long term adaptation is both affordable and feasible.
Universal sustainable behaviours may only be adopted if/when catastrophe is evident - eg: major cities flooded by sea level rise, persistent high temperatures killing millions, agricultural collapse.
The sacrifice most of the 1st world (certainly UK) is making is either inconsequential or laughable:
- we object to wind turbines spoiling the view,
- think we are playing our part by turning down the heating 1 degree,
- we still consume vast quantities of imported and sometimes airfreighted food,
- live in houses with spare rooms (contrast with those living 6 to a room with open sewers)
- we still take foreign holidays and fly,
- insist on the right to drive rather than walk or cycle
- the list could go on for several pages!!
If one accepts the above is a sad reality, the personal response at an extreme is the "prepper" route - off-grid, self sufficient and weaponised. For most, a practical response is education, awareness, access to resources, supporting a local community, live in a temperate land well above sea level.