Knowledge for better food systems

Showing results for: GHG impacts and mitigation

17 July 2018

The Centre for Ecoliteracy, a Californian non-profit, has produced a free interactive guide to understanding food and climate change, covering both how climate change affects the food system and how the food system contributes to climate change.

Image: Lamiot, Coppice short rotation willow, Wikimedia Commons, Creative Commons Attribution 3.0 Unported
10 July 2018

In a guest post for Carbon Brief, Professor Pete Smith of the University of Aberdeen discusses recent research on how climate mitigation through negative emissions could affect biodiversity, through changes in land use. He argues that bioenergy with carbon capture and storage (BECCS) should be implemented sooner rather than later, because of the risk of not meeting climate mitigation targets if BECCS is left until later in the century and because a study estimated that natural land loss could be lower if BECCS is deployed earlier in the century.

Image: Tobias Akerboom, Complaining cow, Flickr, Creative Commons Attribution 2.0 Generic
10 July 2018

A paper proposes a new method for evaluating the climate impact of short-lived greenhouse gases (GHGs) such as methane. Different GHGs are currently assessed on the basis of global warming potential (GWP), calculated as carbon dioxide equivalent, usually over a 100 year time horizon. The paper authors say that this misrepresents the impact of short-lived GHGs, because they have stronger climate impacts shortly after being released and lower impacts after being in the atmosphere for some time.

Image: Tony Atkin, Path Through Miscanthus, Geograph, Creative Commons Attribution-ShareAlike 2.0 Generic
26 June 2018

The Hoffmann Centre at UK think tank Chatham House has produced a summary of a workshop held in January 2018 on policy implications of widespread deployment of negative emissions technologies. The workshop concluded that bioenergy with carbon capture and storage (BECCS) cannot be used at the scale assumed in emissions pathways compliant with the Paris agreement, because it would cause large land use change in regions of high biodiversity and compete with food production for land. Nevertheless, some BECCS may be needed. Direct air capture would use less land than BECCS, but there are economic and technical barriers.​

Image: Bureau of Land Management Oregon and Washington, Rough-skinned newt at Yaquina Head, Flickr, Creative Commons Attribution 2.0 Generic
26 June 2018

A new paper examines how both climate change and land use could affect future biodiversity. It finds that, by 2070, climate change could become a greater driver of species loss than land use change. Climate change alone could cause species loss of 11% to 29% relative to 1961-1960, depending on the severity of temperature rise.

Image: USDA NRCS Texas, Cows grazing in a silvopasture, Flickr, Creative Commons Attribution 2.0 Generic
11 June 2018

FCRN member Eric Toensmeier, of Yale University, has written an op-ed for the Washington Post in which he discusses the potential of silvopasture - including trees on grazing land - to reduce agricultural emissions. Trees increase production by providing shade to livestock, according to the op-ed.

Image: Stacy Spensley, Apple cores, Flickr, Creative Commons Attribution 2.0 Generic
9 May 2018

FCRN member Ramy Salemdeeb of Ricardo Energy & Environment used Life Cycle Assessment to calculate 14 different categories of environmental impacts of three food waste management options: incineration, composting and anaerobic digestion. Composting had the lowest impacts in 7 out of the 14 impact categories.

Image: Graham Hogg, Surplus to requirements, Geograph, Creative Commons Attribution-ShareAlike 2.0 Generic
9 May 2018

Fresh fruit and vegetables deliberately withdrawn from the market and destroyed under the EU’s Common Agricultural Policy accounted for 5.1 Mt CO2 eq. in embedded production-stage emissions between 1989 and 2015, according to research by FCRN member Stephen Porter of the University of Edinburgh.

Image: Tom Driggers, Imported!!, Flickr, Creative Commons Attribution 2.0 Generic
24 April 2018

173 countries have agreed to halve emissions from the global shipping industry by 2050, compared to 2008 levels, in a non-binding deal arranged by the International Maritime Organisation. Saudi Arabia, the US and several other countries raised objections to the proposed emissions cuts. Shipping was not covered by the 2015 Paris agreement on climate change.

Image: Martin Bjørnskov, Marbæk, Flickr, Creative Commons Attribution 2.0 Generic
23 April 2018

A new paper finds that a range of “ambitious but not unrealistic” climate mitigation options could, together, mean that using bioenergy with carbon capture and storage (BECCS) is not necessary for staying within 1.5°C of warming. Mitigation options considered include limiting population, lower meat consumption and use of lab-grown meat, lifestyle changes such as lower car use, electrification of energy end-use sectors, high efficiency manufacturing, agricultural intensification and mitigation of non-CO2 greenhouse gases.

Image: Magnascan, Flame, Pixabay, Public Domain
10 April 2018

A recording of the webinar “Methane and global warming in the 21st century” by Bob Howarth of Cornell University is available here.

Image: CIAT, NP Himachal Pradesh 68, Flickr, Creative Commons Attribution-ShareAlike 2.0 Generic
12 March 2018

This paper calculates country-level mitigation targets for agricultural non-CO2 greenhouse gases (GHGs) based on a variety of allocation methods. This study claims to be the first to calculate national mitigation contributions for the agricultural sector that are consistent with meeting the 2°C target.

13 February 2018

A report by the European Academies’ Science Advisory Council finds that negative emissions technologies (NETs) have ‘limited realistic potential’ and cannot be relied upon to remove carbon at the rate envisaged in the Intergovernmental Panel on Climate Change (IPCC) scenarios for avoiding dangerous climate change.

Image: Cazz, Terraced rice paddies, Flickr, Creative Commons Attribution 2.0 Generic
1 February 2018

A Climate Action Tracker report outlines and quantifies the main opportunities to reduce food-related non-CO2 greenhouse gas emissions, particularly CH4 and N2O.

1 February 2018

Geoengineering to fix climate change could harm biodiversity, according to two modelling studies.

Photo: U.S. Department of Agriculture, How much do fruits and vegetables cost, Flickr, CC by 2.0
12 December 2017

This new study by FCRN member Paul Behrens and colleagues investigates the environmental impacts of a nationally recommended diet when compared to the national average diet for 37 nations across the world, including 9 middle income nations.

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