French President Emmanuel Macron has said the record number of fires in the Amazon rainforest is an “international crisis” that needs to be on the top of the agenda at the G7 summit.
“Our house is burning,” he tweeted.
Brazilian President Jair Bolsonaro said his government was “open to dialogue” about the surge in fires.
But he said calls to discuss the issue at the G7 summit, which Brazil is not participating in, evoke “a misplaced colonialist mindset”.
Satellite data published by the National Institute for Space Research (Inpe) has shown an increase of 85% this year in fires across Brazil, most of them in the Amazon region.
Conservationists have blamed Mr Bolsonaro’s government for the Amazon’s plight, saying that he has encouraged loggers and farmers to clear the land.
He has suggested that non-governmental organisations started the fires, but admitted he had no evidence for this claim.
Mr Macron, host of this weekend’s G7 summit of some of the world’s most advanced economies, warned on Thursday that the health of the Amazon was a matter of international concern.
“The Amazon rain forest – the lungs which produce 20% of our planet’s oxygen – is on fire,” he tweeted. “Members of the G7 Summit, let’s discuss this emergency first order in two days!”
Mr Bolsonaro responded by accusing the French president of using a Brazilian domestic issue for “personal political gain”.
He said he was open to dialogue about the fires if it was “based on objective data and mutual respect”, but hit out at the calls for it to be discussed at the G7 summit.
“The French president’s suggestion that Amazonian issues be discussed at the G7 without the participation of the countries of the region evokes a misplaced colonialist mindset, which does not belong in the 21st century,” he wrote on social media.
He also accused Mr Macron of sensationalising the issue, including by using fake pictures.
The largest rainforest in the world, the Amazon is a vital carbon store that slows down the pace of global warming.
UN Secretary-General Antonio Guterres has also said he is “deeply concerned” about the fires there.
“In the midst of the global climate crisis, we cannot afford more damage to a major source of oxygen and biodiversity. The Amazon must be protected,” he tweeted.