A safe space - p109

Olive Heffernan

Published online: 02 October 2009; doi:10.1038/climate.2009.103

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Thermal threshold - p110

Anna Armstrong

Published online: 10 September 2009; doi:10.1038/climate.2009.88

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Bucking the trend - p110

Alicia Newton

Published online: 10 September 2009; doi:10.1038/climate.2009.89

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High altitude - p110

Olive Heffernan

Published online: 17 September 2009; doi:10.1038/climate.2009.90

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Price of power - pp110 - 111

Anna Barnett

Published online: 17 September 2009; doi:10.1038/climate.2009.91

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Balanced budget - p111

Alicia Newton

Published online: 02 October 2009; doi:10.1038/climate.2009.100

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Meat-eater's malady - p111

Anna Armstrong

Published online: 02 October 2009; doi:10.1038/climate.2009.101

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Planetary boundaries - p112

Published online: 23 September 2009; doi:10.1038/climate.2009.92

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Planetary boundaries: Thresholds risk prolonged degradation - pp112 - 113

William H. Schlesinger

For nitrogen deposition as for other pollution, waiting until we approach the limits of environmental degradation merely allows us to continue our bad habits until it's too late to change them.

Published online: 23 September 2009; doi:10.1038/climate.2009.93

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Planetary boundaries: Keep off the grass - pp113 - 114

Steve Bass

Humanity must learn to live within a stable Holocene environment, but the boundary limit for land use depends on more than the amount of surface covered.

Published online: 23 September 2009; doi:10.1038/climate.2009.94

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Planetary boundaries: Tangible targets are critical - pp114 - 115

Myles Allen

Setting a limit on long-term atmospheric carbon dioxide concentrations merely distracts from the much more immediate challenge of limiting warming to 2 °C.

Published online: 23 September 2009; doi:10.1038/climate.2009.95

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Planetary boundaries: Identifying abrupt change - pp115 - 116

Mario J. Molina

Five per cent is a reasonable limit for acceptable ozone depletion, but it doesn't represent a tipping point.

Published online: 23 September 2009; doi:10.1038/climate.2009.96

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Planetary boundaries: The devil is in the detail - pp116 - 117

David Molden

A global limit on water consumption is necessary, but the suggested planetary boundary of 4,000 cubic kilometres per year is too generous.

Published online: 23 September 2009; doi:10.1038/climate.2009.97

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Planetary boundaries: Consider all consequences - pp117 - 118

Peter Brewer

Ocean acidification has impacts other than simple changes in pH, and these may need boundaries too.

Published online: 23 September 2009; doi:10.1038/climate.2009.98

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Planetary boundaries: Rethinking biodiversity - pp118 - 119

Cristián Samper

A boundary that expresses the probability of families of species disappearing over time would better reflect our potential impacts on the future of life on Earth.

Published online: 23 September 2009; doi:10.1038/climate.2009.99

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Must-reads for Copenhagen - pp120 - 122

Mike Hulme, Tony Juniper, Mark Lynas, Oliver Morton, Ron Oxburgh, Rajendra K. Pachauri, Roger Pielke, Jr, Andrew Revkin & Joseph Romm

At the UN Climate Conference in Copenhagen this December, talk will turn to scientific, political and economic issues with a global reach and a long history — not easy to pick up from the daily news. We asked select experts on climate change what books we should be reading ahead of the big event.

Published online: 02 October 2009; doi:10.1038/climate.2009.102

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