One-third of the mitigation efforts needed in the next decade could be delivered by conserving and restoring nature. Conserving and restoring natural spaces, both on land and in the water, is essential for limiting carbon emissions and adapting to the climate emergency. It would also improve rural livelihoods, build resilience and support COVID-19 recovery. Nature-based solutions offer cost-effective ways to tackle the triple planetary crises of climate change, biodiversity loss and pollution.