Pulling in greenhouse gases from the atmosphere will be crucial in the fight against climate change.
Nature has its own solution – the trees of vast rainforests capturing and storing carbon through photosynthesis.
But rampant deforestation means the world’s largest rainforest, the Amazon, now emits more carbon dioxide than it can absorb – more than a billion tonnes a year.
We went to the heart of the Amazon to see how Brazil’s President Jair Bolsonaro is driving more exploitation of this precious habitat.