1) Boycott or put drastic tariffs on Brazilian meat and soy, aka the products that are made out of the areas which were former rainforest. The problem: China won't give a fuck about Western sanction and Bolsonaro and his goons will happily sell to them (aided by the fact that China still has issues with pig fever in their domestic meat production).
2) Pay off Bolsonaro and his goons. That stops the destruction, but provides a fascist dictatorship with even more money.
3) Hope for Lula to win in the elections in October. The problem: Bolsonaro may manipulate the election to stay in power, either in front (by having Lula arrested or preventing him from campaigning, public debates etc.) or afterwards (outright vote manipulation). Or he might legitimately win despite his current lag in the polls, which makes the situation even worse than it already is.
4) Have the CIA do what they have a lot of experience in: get rid of Bolsonaro and his goons, either by abducting him and hold him to trial in the US similar to drug barons or by permanently eliminating him. That would be the cleanest way and send a signal to other criminal destroyers of nature, but without a whole lot of effort the resulting power vacuum may destabilize the region even more than it already is.