The Political Climate in Paris?

The Climate Change talks in Paris probably represent a last chance to do anything meaningful about 'greenhouse gases' and their effects on world median temperature rises (http://www.theguardian.com/environment/2015/nov/30/obama-calls-paris-climate-talks-an-act-defiance-wake-recent-attacks). The trouble is that the meeting involves politicians and politicians are ephemeral creatures (they want to be elected/re-elected). They rarely want to tell voters that they 'may have to use less and things might cost more'. They are generally even more reluctant to tell groups that their employment may be in jeopardy and multi-nationals (who may contribute to their party finances), employing them to change their ways and expectations of profits. Furthermore, politicians are often eventually replaced (the adage 'every political career ends in failure' really applies) by someone with diametrically opposite views, so 'agreements' in Paris may not be totally binding.