UN climate talks start in Doha

Modest expectations marked the start of UN climate talks Monday, as negotiators and experts all warned that the two-week session would only lay the groundwork for a potentially ambitious global-warming pact by the end of the decade.

Good work so far, but we're not seeing the wood for the trees

If you've ever seen large-scale deforestation, especially of the rainforest, and seen it close up when it's just happened, you feel you're in the aftermath of an armoured battle. The scale of the destruction stuns you: cleared ground which seems to be everywhere smoking, burning tree stumps flickering like huge candles. It feels as if some giant beast has torn off a great lump of the landscape and savagely consumed it, leaving bits of it bleeding behind.

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Why urban commuters can breathe more easily

David Phelan finds out that London no longer deserves to be known as the ‘Big Smoke’ – and discovers what other communities can do to follow its example