Commentary in 2007

The drivers and impacts of climate change extend beyond greenhouse gas emissions and rising temperature, especially when deforestation enters the picture. In deciding how best to mitigate, we may need to favour direct calculations of cost over current means of measuring climate change.

International climate policy needs to induce a socioeconomic tipping to a low or no-carbon economy if we are to avoid climate change tipping points.

Voluntary greenhouse-gas emission offset markets are in need of government oversight.

Reactive nitrogen, a known pollutant, has the ability to fertilize forests, thereby boosting land-based carbon sinks. Dave S. Reay looks at its potential to reduce atmospheric carbon dioxide concentrations.

The latest report from the Intergovernmental Panel on Climate Change assesses the skill of climate models by their ability to reproduce warming over the twentieth century, but in doing so may give a false sense of their predictive capability.

Avoiding dangerous climate change will require considerable global efforts to reduce greenhouse gas emissions. A daunting challenge, but one that is practically and economically achievable, argues Jeffrey D. Sachs.