With the COP29 summit now in its final days, we take a closer look at the Amazon rainforest in Brazil. A major global carbon sink that's nicknamed the lungs of the planet, the Amazon is once again under threat. Illegal fires set by farmers ravaged millions of hectares over the summer. Our France 2 colleagues followed the police as they tracked down those responsible. They bring us this report, with FRANCE 24's Luke Shrago.