World leaders meeting in Paris on Thursday could give poorer countries access to hundreds of billions of dollars to tackle climate change.
Mia Mottley, Barbados’ first female prime minister, is leading the global battle for that money and told BBC News her tiny country urgently needs help.
Poorer nations want more money because they have done little to cause climate change but face its worst effects.
They also struggle to afford expensive projects like renewable energy.
Climate finance, including funding for flood defenses or solar power plants, has long been one of the biggest stumbling blocks in climate negotiations.
But Ms. Motley has built a global coalition to support her demand that the international financial system be fundamentally reformed.
“We’re all in this together,” Ms Motley told BBC News in Paris. “If we don’t realize this, we won’t act with the urgency needed to save the planet and lives.”
The Prime Minister of Barbados is co-hosting the conference in Paris with French President Emmanuel Macron.