I did read that China's CO2 output in 8 years is more than the UK total since the industrial revolution .... however, we'd pauper ourselves to be seen as the good guy while China shrugged their shoulders when it comes to compensation.
One interesting point regarding 'climate reparations' ..... are we to believe that the nations looking to be paid were never beneficiaries of the fruits of developed countries industry? ... no cars, steel, ships or consumer goods??
Back in the early days of industrialisation the UK was way and above the biggest source of CO2 (which is what often gets selectively examined in spite of the fact that was measured against what was then a pre-industrial world and has since paled into far less significance as the big polluters got into their stride) ... however, it was also the 'Workshop of the World' producing essentials like steamships and railways consumed by, and immeasurably benefiting, a Global Market.
In the same way as we acknowledge 'offshored' CO2 via extra-national production others need to acknowledge their historical 'offshored' share of ours.