Brazil's Amazon deforestation ploughs on

Deforestation in Brazil's Amazon rainforest rose for a third consecutive month in May, with President Jair Bolsonaro yet to follow through on his April pledge to boost funding for environmental enforcement.

Deforestation soared 67 per cent in May from the same month last year, according to Brazil's national space research institute Inpe, with much of the land targeted for cattle ranches, farms and logging.

For the first five months of the year, the data show deforestation was up 25 per cent compared with a year earlier, with 2548 sq km destroyed - an area more than three times the size of New York City.

Deforestation peaks during the dry season from May to October, when it is easier for illegal loggers to access the forest.

Bolsonaro pledged at an Earth Day summit in April to double funding for environmental enforcement.

The next day, he signed the 2021 federal budget that slashed environmental spending.

Environment Minister Ricardo Salles immediately submitted a proposal for the Economy Ministry to increase environmental spending, but that request that has gone unanswered for more than a month.

Bolsonaro's office did not respond immediately to a request for comment.

US President Joe Biden's administration has been negotiating with Brazil on potentially funding efforts to conserve the Amazon but officials do not expect immediate action.

"Unfortunately the Bolsonaro regime has rolled back some of the environmental enforcement," US climate envoy John Kerry told a Congressional hearing last month.

"We've had this conversation. They say they are committed now to raise the budget.

"If we don't talk to them, you're guaranteed that that forest is going to disappear."

Bolsonaro's strategy to protect the Amazon has relied heavily on expensive military deployments that first began in late 2019.

The government withdrew the armed forces at the end of April, having failed to return deforestation to pre-Bolsonaro levels.