The COP30 climate summit is taking place in the Brazilian city of Belém for the next two weeks. It's run by the United Nations (UN) and every year is one of the biggest events in the calendar, especially for world leaders and environmental campaigners. This COP is in the Amazon rainforest. The country's president, Luiz Inácio Lula da Silva, says it will be an historic summit because it is "a COP in the Amazon, not a COP about the Amazon". All world leaders are invited, but not all attend. US President Donald Trump, for example, won’t be there.

Every year at COP countries make commitments about what they will do over the next year with the aim of reducing climate change. But this year's summit is particularly important as it marks ten years since the Paris Agreement and people will be tracking our progress. The BBC’s Georgina Rannard breaks down everything we need to know about this year’s COP. Plus Natalia Tsuyama, who’s a climate activist based in Brazil, shares why she’s feeling hopeful.

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Presenter: Hannah Gelbart
Producers: Mora Morrison, Maria Clara Montoya and Rio Rennalls
Editor: Verity Wilde