Showing results for: GHG emission trends
Meat and Livestock Australia (MLA) reports that the Australian beef industry has reduced its environmental footprint over the past 30 years. The results are presented in a new paper in Agricultural Systems, and in a press-release MLA writes that:
Some scientists have suggested that Africa's wet savannahs could be ideal for growing crops needed to meet the growing demand for food and bioenergy. In this paper however, researchers from Princeton University and the CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS) warn that farmland conversion of these savannahs will come at a much higher cost than previously thought.
This updated version further develops the Planetary Boundaries concept, which was first published in 2009. In their original outline of the concept the authors identified nine key global processes and systems that regulate the stability and resilience of the Earth System – the interactions of land, ocean, atmosphere and life that together provide conditions upon which our societies depend. They argued that if these natural processes are disrupted beyond a certain ‘boundary’ point, the consequences could be irreversible and lead to abrupt environmental change, making life on earth very hard for humans.
This new study finds that GHG emissions from growing crops and raising livestock are now higher than from deforestation and land use change. It combines three global datasets of greenhouse gas emissions for the 'Agriculture, Forestry and Other Land Uses' (AFOLU) sector. It includes emissions from different sectors and human activities such as deforestation, clearing and burning biomass, and from raising and feeding livestock.
Though politicians and scientists have disagreed about whether atmospheric warming can be delayed by reducing short-lived climate forcing (SLCF) agents, an international research team has confirmed that a reduction in carbon dioxide emissions is the only long-term solution. Previously, politicians and industry had been pushing for measures to reduce SLCF emissions as a way to buy time before needing to address CO2 emissions directly.
A new study from researchers at The Earth Institute of Colombia University and the Woods Hole Research Center says emissions of nitrous oxide could double by the middle of the century if left unchecked. Nitrous oxide is the third biggest contributor to human-induced climate warming after carbon dioxide and methane.
This report, Closing the door on HFCs, documents the continued shift away from hydrofluorocarbons (HFCs) in the supermarket refrigeration sector. Now in its sixth year, EIA’s Chilling Facts reports have become an important resource used to disseminate information about progress in the shift away from HFC-based technology.
In the recent annual report from the Global Carbon Project (GCP) we are warned that if emissions continue to climb at current rates, we will not be able to keep global warming to less than two degrees Celsius. The research suggests that if we wish to limit global warming (to 2 degrees) we will have to stay below 3,200 billion tonnes of carbon dioxide.
Concentrations of carbon dioxide last year grew at the fastest rate since 1984, says a BBC news article. Reporting on data released by the World Meteorological Organisation, the article describes how this increase in concentration is due not only to increased greenhouse gas emissions, but also to a reduced carbon uptake by the biosphere. This reduction could be temporary, or it could be an indication that the biosphere has reached its absorption limit. The article points out that seas, trees, and living things, which play an important role by absorbing over half of the total greenhouse gas emissions, are also breaking records; the oceans soak up about 4kg of CO2 per person every day, a rate unparalleled over the last 300 million years and resulting in unprecedented salination of the oceans.
The The Human Dynamics of Climate Change map has been created in a joint effort by scientists and policymakers and it shows how climate change could affect people all over the world by the end of the century if carbon emissions continue unabated.
This new paper published in Nature Climate Change, focuses on food demand-side climate change mitigation options. It suggests that if current trends continue, food production alone will reach (if not exceed) the global targets for total greenhouse gas emissions in 2050. Diet preferences are shifting globally toward meat-heavy western foods with a high GHG-impact and this, combined with a growing global population, imply that even if we manage to increase agricultural yields (through for example sustainable intensification), this will not be enough to meet projected food demands.
The authors behind this study say that climate change has substantially increased the prospect that crop production will fail to keep up with rising demand in the next 20 years.