He cited the fact that most of Brazil's forest is preserved, which means emissions from the carbon they contain has been avoided.

Deforestation in Brazil's portion of the Amazon rainforest has skyrocketed under Bolsonaro, hitting a 12-year high in 2020 with an area 14 times the size of New York City being destroyed, government data show.

Salles said just $1 billion per year out of the $10 billion would enable Brazil to reach zero illegal deforestation ahead of the existing 2030 target.

About one-third of that money would go toward contracting more environmental agents, probably drawing from the ranks of the national military police, Salles said.

The other two-thirds would be used to invest in sustainable development of the Amazon region, he said.

"This is what we presented," Salles said, about the proposal to stop deforestation. "In what spirit? You want a plan? Here is a plan."

Bolsonaro on Wednesday sent a letter to US president Joe Biden recommitting Brazil to eliminating illegal deforestation by 2030, a target that the recent surge in Amazon destruction had called into question.

But the letter stopped short of meeting other United States demands that include an immediate decrease in deforestation in 2021 and stepped up environment enforcement.

Vice president Hamilton Mourao, who Bolsonaro has put in charge of Amazon policy, said on Friday that reaching the 2030 target would require a 15-20 per cent reduction in Amazon deforestation every year until then.

Mourao said the government is studying extending a military deployment to protect the Amazon if destruction does not come down that much by July.

The expensive military deployment is set to finish at the end of this month, having failed to restore deforestation and fires to levels prior to Bolsonaro taking office.

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