This study argues that government biofuel policies rely on reductions in food consumption to generate greenhouse gas savings. It looks at three models used by U.S. and European agencies, and finds that all three estimate that some of the crops diverted from food to biofuels are not replaced by planting crops elsewhere. About 20 to 50 percent of the net calories diverted to make ethanol are not replaced through the planting of additional crops.

A number of major US NGOs, research institutions and academics have come together to support the recommendations of the 2015 Dietary Guidelines Advisory Committee (DGAC). An open letter, signed by more than one hundred individuals and institutions has been published in major daily newspapers urging Health and Human Services Secretary Sylvia Mathews Burwell and Agriculture Secretary Tom Vilsack to adopt the DGAC’s scientific recommendations on sustainability.

Due to the large share of non-CO2 GHGs in emissions from livestock production, the choice of GHG metric used to compare emissions of different GHGs is crucial, both in order to assess the aggregate contribution of the livestock sector to climate change and for highlighting hot-spots in the animal food chain where emission reductions can be most cost-effectively made.

This report sets out new climate change projections for Australia. It was produced by Commonwealth Scientific and Industrial Research Organisation (CSIRO) and funded by the Australian Government Department of the Environment, CSIRO and the Australian Bureau of Meteorology. The key findings from the report are copied as follows:

A new paper produced by a global group of agrosystem modellers, argues that if no action is taken to adapt, the future global wheat harvest is likely to be reduced by 6 % per each degree Celsius of local temperature increase. This would correspond to 42 million tonnes of yield reduction worldwide, which equals a quarter of current global wheat trade.

In our latest blog-post, “Grazing livestock in a world of climate change: do they have a role?” Elin Röös summarised her views from the Sustainable Food Trust workshop on the role of grazing animals.

Two reports this week by the US National Research Council look at whether humans could artificially steer Earth's climate by reflecting sunlight back into space, or by taking carbon dioxide out of the atmosphere. The twin reports– Climate Intervention: Carbon Dioxide Removal and Reliable Sequestration and Climate Intervention: Reflecting Sunlight to Cool the Earth argue that carbon dioxide removal might have a place in a broader response plan, but sunlight-reflecting technologies are too risky.

This study focuses on UK diets.  It finds that if in average diets conformed to WHO recommendations, associated GHG emissions would be reduced by 17%.  Further reductions of up to 40% can be achieve through dietary shifts that include a reduction in animal products and processed snacks, and more fruit and vegetables. Abstract and conclusions as follows:

The UK’s Department of Energy and Climate Change has published a report based on their newly developed Global Calculator tool.