The world’s largest maritime nations are gathering in London Tuesday in a bid to strike a historic climate deal that could reshape the global shipping industry.

The proposed Net-Zero Framework would introduce a marine fuel standard that tightens over time, gradually lowering the emissions ships are allowed to produce. With maritime transport responsible for nearly 3% of global emissions and rising the need for change is urgent.

“The goal is to force the shipping industry to switch away from fossil fuels,” said Faig Abbasov, shipping director at Transport and Environment.