Brazilian President Jair Bolsonaro reacted angrily on Wednesday to Joe Biden’s call for a world effort to offer Brazil $20 billion to end Amazon deforestation or face unspecified “economic consequences.”

“As the head of state who has brought Brazil-US relations closer than ever before, after decades of governments that were unfriendly towards the US, it is really difficult to understand such a disastrous and unnecessary declaration,” Bolsonaro wrote on Twitter.

“I would be gathering up and making sure we had the countries of the world coming up with $20 billion, and say, ‘Here’s $20 billion. Stop tearing down the forest. And if you don’t then you’re gonna have significant economic consequences.” Biden said on Tuesday.