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Climate mitigation policies rarely account for the time lags associated with land-based greenhouse gas mitigation policies such as reforestation, bioenergy with carbon capture and storage (BECCS) or reduction of agricultural emissions, argues this paper, making it unlikely that commitments under the Paris Agreement will be met.
This paper uses long-term studies from Europe and China to examine the effects on soil quality of organic matter addition, no-till practices, crop rotation and organic farming. It finds that yields are lower under no-till and organic practices, but that these practices are associated with higher soil organic matter.
This paper, by John Lynch of the University of Oxford’s LEAP project, finds that carbon footprint studies of beef cattle typically do not report separate values for emissions of different greenhouse gases such as methane and nitrous oxide. Instead, studies generally report only an aggregated figure in the form of the 100-year Global Warming Potential (GWP100) as CO2-equivalent.
This paper, by researchers from the University of Oxford’s LEAP project, models the climate impacts of beef cattle and cultured meat over the next 1000 years using a climate model that treats carbon dioxide, methane and nitrous oxide separately, instead of using the widespread Global Warming Potential, which assigns a CO2-equivalent value to each greenhouse gas according to warming caused over a specified timeframe.
This commentary in Nature Sustainability discusses governance and initiatives for conserving and increasing soil organic carbon. Through a multi-stakeholder discussion group, the authors developed a global agenda for action on soil organic carbon.
Over 40% of insect species are at risk of extinction over the next few decades and 75% to 98% of insect biomass has already been lost, according to this review of the current state of knowledge about insect declines, with habitat loss through conversion to intensive agriculture being the main driver. Agro-chemical pollutants, invasive species and climate change are also driving insect declines.
Aquaculture generally supplements wild fisheries rather than replacing them, according to this paper, which used models based on historical data.
Switching to an organic diet for six days significantly reduced the levels of several pesticides and pesticide metabolites found in the urine of the 16 participants of this study.
Using home-made solar cookers instead of microwaves could reduce greenhouse gas emissions and electricity use as well as enhance social well-being and motivate people to behave more sustainably, according to this paper, which considers Spain as an example.
This life cycle assessment of beef cattle production in the United States calculates greenhouse gas emissions, fossil energy use, blue water consumption and reactive nitrogen loss per kg of carcass weight.
This paper uses economic models to calculate the extent to which both supply-side and demand-side measures could reduce non-CO2 greenhouse gas emissions from the agricultural sector, depending on carbon price.
According to this paper, 23% of deforestation in Indonesia between 2001 and 2016 was caused by palm oil plantations, 20% by conversion of forests to grasslands or shrublands (including conversion caused by fire), 15% by small-scale agriculture, 14% by timber plantations, and the remainder due to other causes including logging roads, mining and fish ponds.
This paper models the relationship between soil organic matter and yields of maize and wheat, finding that while higher soil organic carbon (a proxy for soil organic matter) levels do generally correspond to higher yields, the yields taper off at around 2% soil organic matter.
This paper maps interruptions to food production across the world between 1961 and 2013 and highlights the links and tradeoffs between events in different food sectors, including crops, livestock, fisheries and aquaculture.
This paper explores attitudes towards eating insects, based on a online survey of Finnish consumers. It finds that both vegetarians and omnivores are more likely than vegans to consider eating food made from insects.
FCRN member Diego Rose has written a paper on the links between dietary choices in the United States (based on real dietary data), environmental impacts, and nutrition quality, finding that the diets with the lowest greenhouse gas emissions per calorie generally scored better on the US Healthy Eating Index.
This paper models the system-wide changes and consequent shifts in pre-retail greenhouse gas emissions that might result from introducing a Europe- or North American-style refrigerated food chain to sub-Saharan Africa. Total emissions might increase or decrease, depending on the scenario.
This paper presents a ‘carbon benefits index’ to measure how land use change contributes to global carbon storage and reduction in greenhouse gas emissions. The index accounts for both the carbon that could be stored if the land were reforested, and the carbon emissions of producing the same food elsewhere.