Brazil's environment minister says the country needs $10bn (£7.2bn) a year in foreign aid in order to reach zero emissions by 2050, APA reports citing BBC.
The move would mean that Brazil could achieve the symbolic figure 10 years earlier than currently planned.
It comes ahead of US President Joe Biden's climate summit next week.
Brazil's environmental policies have brought international condemnation since President Jair Bolsonaro took office two years ago.
He has encouraged agriculture and mining activities in the Amazon, the world's largest rainforest.
Environment Minister Ricardo Salles said $1bn would be used to reach zero illegal deforestation in the Amazon by 2030.
He added that a third of the money would be used to recruit more environmental agents, potentially from the national military police. The remainder would be used to invest in sustainable development of the Amazon, he told Reuters news agency.
Mr Salles said he does not expect a deal to be made before next week's virtual summit.