Data show a 42 percent drop in forest clearance from a year earlier, giving Lula a boost before the election run-off. The Amazon rainforest is a crucial buffer against climate change - but deforestation had expanded under former president Jair Bolsonaro. Key points and original sources are listed below.

• Data show a 42 percent drop in forest clearance from a year earlier, giving Lula a boost before the election run-off.S1

• The Amazon rainforest is a crucial buffer against climate change - but deforestation had expanded under former president Jair Bolsonaro.S2