World leaders descend on Brazil for COP30 - but where have three decades of climate talks got us? Sky’s correspondents have travelled to four key regions around the globe where the cause and effect of the climate crisis are inescapable. As global giants China steer the climate’s course, we meet those in the Amazon who feel the force of its impact. From India’s coal-burning boom to US presidents in denial, we visit the key players and worst offenders deciding the fate of our planet and ask - is ‘