UN climate talks got a boost Wednesday as Brazilian president-elect Luiz Inacio Lula da Silva vowed to fight Amazon deforestation and global leaders reaffirmed key pledges.

The outgoing Brazilian President Jair Bolsonaro met with advisors to his incoming successor Luiz Inacio Lula da Silva on Thursday, who described the visit as "positive" amid fears that the far-right incumbent would try to contest his election defeat.

Brazilian President Jair Bolsonaro on Tuesday did not concede defeat in his first public remarks since losing Sunday's election.

Brazil's Supreme Court has ordered the removal of roadblocks set up by the supporters of far-right President Jair Bolsonaro, who is yet to concede defeat in the presidential election.

Lula has vowed a return to state-driven economic growth and social policies that helped lift millions out of poverty when he governed Brazil from 2003 to 2010.

A polarized Brazilian electorate cast votes in a knife-edge presidential runoff that pits far-right incumbent President Bolsonaro against leftist former leader Silva.

An American journalist and political commentator says the Brazilian election is difficult to understand from a US perspective.