The stimulus package to battle the economic effects of the coronavirus proposed by House Democrats includes provisions to crack down on pollution from the airline industry.

The bill also includes more than $50 billion in relief for the industry, but it would require airlines to go carbon neutral for domestic flights by 2025. It also promotes cleaner jet fuels and would greenlight the government to buy older, less efficient planes from airlines.

Environmentalists have pushed the party not just to crack down on airlines but to offer tax incentives to the renewable energy sector. But Democrats’ efforts to include environmental language have in part stalled similar legislation in the Senate, where a vote on a stimulus package has once again been delayed.