It is 100 days until Cop15 – and the omens are good for a global plan to protect nature | John Vidal

Despite many challenges, December's crucial biodiversity talks in Montreal may set a new path for humans to live with nature

• What is Cop15 and why does it matter for all life on Earth?

They are known as the twins", born in 1992 at the Earth Summit in Rio de Janeiro but diplomatically separated and left to develop at different speeds. One is the UN's climate change convention, or UNFCCC, now a fully fledged global agreement with huge annual summits attended by heads of state and rock stars pledging to reduce emissions.

The other, the UN convention on biological diversity (CBD), aims to protect the world's 10 million species of animals and plants, but it meets less often, is modest by comparison, and has yet to make its mark with the public in the same way as climate.

John Vidal is a former Guardian environment editor