1 Can we keep 1.5 alive?“Keep 1.5 alive” has been the UN’s rallying cry for a number of years, a reference to the goal of ensuring that average global temperatures don’t soar beyond 1.5 degrees higher than pre-industrial levels. The scientific consensus is that a lack of action would have catastrophic consequences, not least for the so-called “frontline States”, such as developing island nations which could disappear under the ocean, as sea levels rise.A man fishes sitting on sandbags which protect the Pacific Ocean island nation Tuvalu against sea erosion.At COP30, the UN climate conference scheduled to take place between 10 and 21 November 2025, mitigation (in other words, actions and policies designed to reduce the greenhouse gas emissions that contribute to rising temperatures) is likely to a key focus.The nations of the world will arrive with upgraded, more ambitious commitments to lowering greenhouse gases. This is both a recognition that existing pledges are wholly inadequate, in terms of getting temperatures down, and part of the deal that Member States signed up to in 2015 at the Paris COP (nations are expected to “ratchet up” their commitments every five years. The last time this happened was at the 2021 Glasgow COP, delayed by one year because of the COVID-19 pandemic).2 Protecting natureHolding COP30 in the Amazonian rainforest region of Brazil is of symbolic importance. It harks back to the early days of international attempts to protect the environment: the pivotal “Earth Summit”, which led to the establishment of three environmental treaties on climate change, biodiversity, and desertification, took place in the Brazilian city of Rio de Janeiro in 1992.A parrot stands on a tree branch in Maharashtra, India.The location also highlights the role that nature has to play in the climate crisis. The rainforest is a massive “carbon sink”, a system that sucks up and stores CO2, a greenhouse gas, and prevents it from entering the atmosphere, where it contributes to warming.Unfortunately, rainforests and other “nature-based solutions” face threats from human development, such as illegal logging which has devastated huge swathes of the region. The UN will continue efforts begun in 2024 to improve the protection of the rainforest and other ecosystems, at biodiversity talks due to be resumed in Rome in February.3 Who’s going to pay for all this?Finance has long been a thorny issue in international climate negotiations. Developing countries argue that wealthy nations should contribute far more towards projects and initiatives that will enable them to move away from fossil fuels, and power their economies on clean energy sources. The pushback from the rich countries is that fast-growing economies such as China, which is now the biggest emitter of greenhouse gases in the world, should also pay their share.Activists protest against fossil fuels at COP29 in Baku, Azerbaijan.At COP29 in Baku, Azerbaijan, a breakthroug