Fish farms, and other forms of aquaculture, are seen as a potential solution to meeting increasing global demand for seafood. However, according to recent research, they must reduce their reliance on wild fish for animal feed if current production levels from both aquaculture and wild fisheries are to be maintained.

Standardised methods of categorising environmental data are needed at European and international levels for effective international policies. A recent study has concluded that a European framework that harmonises environmental data at the continental scale corresponds well with national classification systems, although some modifications may be needed to capture small-scale regional variations.

Although the causes of Alzheimer's disease are still unknown, it is clear that the disease commences with progressive amyloid deposition in the brains of affected persons between ten and fifteen years before the emergence of initial clinical symptoms such as memory loss. Researchers have now been able to show that Aducanumab, a human monoclonal antibody, selectively binds brain amyloid plaques, thus enabling microglial cells to remove the plaques. A one-year treatment with the antibody, as part of a phase Ib study, resulted in almost complete clearance of the brain amyloid plaques in the study group patients. The results, which were realized by researchers at UZH together with the biotech company "Biogen" and the UZH spin-off "Neurimmune," have been published in the renowned science journal "Nature."

read more

The Large Scale Grazing Systems (LSGS) of the EU are governed by legislation at regional, national and European levels. New research investigates an LSGS in Spain and suggests that the area’s traditional mix of sheep and cereal farming needs improved, better co-ordinated regulatory support to survive.

Despite the current economic situation, organic farming is a growth sector in the EU. A recent EU-funded study suggests support payments from the amended 2003 Common Agricultural Policy (CAP) for organic farming will continue to play an important role in Western European countries and will become increasingly significant in new Member States.

Climate change poses a large threat to African agriculture, but there is little research on how to respond. A recent study indicates that traditional adaptation methods are not enough and international collaboration is needed in ‘planned adaptation’ by collecting and conserving certain crops for the future.

A recent study investigates the factors that affect a farmer’s decision to convert to organic farming in Latvia and Estonia. A combination of social factors, such as peer pressure, and economic influences, such as subsidies, were found to be more important than either factor individually.

Biochar is increasingly mixed into farm soils to improve crop productivity and maintain carbon stocks. However, it can change the way that pesticides applied to the same soil behave, according to a new study. The researchers suggest that farmers may also need to follow new guidelines on pesticide application if they add biochar to their soil.

Improving the efficiency of milk production could produce significant annual savings and potentially cut the environmental impacts of the industry by up to a third, according to new research from Northwest Spain.

There is a need to broaden the debate on sustainable food security from a straight comparison between organic and conventional farming to a consideration of a variety of farming techniques. This is the conclusion of a new review of research that indicates, for some crop types, organic yields can nearly match conventional yields under good management practices and growing conditions.

Converting grassland to arable land can reduce the diversity of nematodes, predatory mites, earthworms and enchytraeid worms in the soil, according to a study by Dutch researchers. However, they found that restoring arable land to grassland did not fully restore the diversity of these four groups during the course of the four-year study.

A new study suggests that abandoned farmland is widespread in Europe and that not all land that has been abandoned is unsuitable for farming. Understanding how abandoned farmland is distributed may be important for making land management decisions – for instance, recultivation versus reversion to forest.

New research has analysed some of the issues around the implementation of the EU's Environmental Noise Directive (END) by Member States. It demonstrated large differences in the way noise levels are calculated and geographically mapped between countries and called for more standardised and clearer guidelines.

A new study has developed a scoring system that could help authorities approve proposals for onshore wind plants. It considered four aspects of a wind farm: the technical properties, the social impact, the environmental impact and the share of earnings offered as compensation for any negative effects.

Dire messages about the impact of global warming may increase scepticism because they contradict a commonly held belief that the world is a just and orderly place. This is the conclusion of new psychological research which investigated the reaction of individuals to messages about global warming.

Concerns about the negative impacts of ‘sunshade’ geoengineering on global food security are not supported by a recent modelling study, the first to simulate yield changes in a geoengineered climate. However, to mitigate climate change, the researchers suggest actions to reduce CO2 emissions are safer than introducing geoengineering projects, partly because some regions may actually suffer reduced crop yield in a geoengineered climate.

Researchers have demonstrated that hatching in polar cod can begin as early as January in Arctic seas that receive large freshwater input, compared to April-July in seas with little freshwater input. Since early hatching leads to higher survival rates, the effects of climate change may enhance polar cod’s survival by favouring conditions that allow winter hatching to occur.

For thousands of years, vast amounts of methane – a potent greenhouse gas – have been stored in frozen deposits on land and under the ocean in the Arctic. A new study has found that rapidly rising temperatures are accelerating the release of methane by thawing subsea ‘permafrost’, releasing nearly 8 million tonnes into the atmosphere each year and potentially increasing global warming.

Noise caused by construction of Germany’s first offshore wind farm caused significant habitat disturbance for harbour porpoises, according to a recent study. Its results suggest that porpoises avoided areas up to 20 kilometres from the noise source during construction of the wind farm’s foundations.

Crop pests and pathogens are moving into new habitats, towards the North and South Poles, as global warming progresses, new research suggests. Observation records from around the world show that many crop pests, including insect and bacterial pests, are moving towards the poles at an average rate of 2.7 km per year.

Despite the substantial impacts warming and drought can have on soil bacteria and fungi, these are not sustained if external conditions re-stabilise, a new study suggests. Small-scale experiements in five countries across Europe to show that even if warming and droughts continued for over a decade, there were no lasting effects on key properties of soils, such as growth rates, when the soils were allowed to re-stabilise in a laboratory over seven days.

The largest ice sheet in the world, the east Antarctic ice sheet, may succumb to climate change faster than thought, according to recent research. Warming ocean currents, triggered by shifting wind patterns, could accelerate melting of the ice sheet, leading to a rise in sea levels, say the researchers.

Harmful algal blooms may become more common in north western European waters as a result of climate change, according to a new study. The researchers predicted that by the end of this century blooms of two groups of algal species will occur over larger areas and for longer periods every year.

The benefits of CO₂ cuts made now, such as avoided floods and droughts, will be felt within the lifetimes of most people alive today, new research indicates. The study’s authors say their work dispels myths that the main effects of CO₂ emissions will not be felt for many decades. They estimate that it could take 10 years for the maximum warming effects of a one-off CO₂ emission to occur.

A number of studies have shown that the public misunderstand global warming. Taking a fresh approach, this study investigated the willingness of the public to take part in activities that mitigate climate change. An international survey of 24 countries revealed that this is strongly related to personal experiences with global warming. The authors say linking actions to benefits could encourage climate change mitigation behaviour.

Glaciers are sensitive indicators of climate change. This study focused on hanging glaciers in the French Alps, where warming is increasing the risk of glaciers collapsing. The authors applied a state-of-the-art numerical model to a particularly hazardous glacier in Mont Blanc to simulate how it will respond to climate change. The results suggest the glacier may become unstable in the current century, posing a risk to the inhabitants of the valley below.

Huge amounts of soil carbon have been discovered up to 1 metre below grassland in a recent UK study. Yet most carbon inventories do not assess soil deeper than 30cm. Furthermore, this research suggests that intensive management of grassland, involving high rates of fertiliser use and livestock grazing, may deplete carbon at these depths.

Urban agriculture is becoming increasingly popular. A recent assessment of rooftop farming in Barcelona shows differing attitudes towards the practice, and provides important recommendations for the development of agricultural policy for the 21st century, such as including food production as a potential use of rooftops in planning legislation.

New research indicates that large-scale wind farms may influence local weather. It suggests the impact can be minimised by changing the design of the rotors or positioning wind farms in regions with high natural turbulence. These strategies could also make the farms more productive.

General acceptance of offshore wind farms is most positively influenced by reductions in fossil fuel imports and contributions to global warming mitigation, and most negatively by concerns about increases in electricity price and impacts on scenic views, US research suggests. Other factors, such as reductions in air pollution, were not closely related to general acceptance even though on average the public rated them as important.

Wind farms are an important component of Europe’s shift towards a greener energy supply, but they could potentially have an impact on marine ecosystems. This study provides the first measurements of the distribution of harbour seals in relation to the construction and operation of wind farms, and makes recommendations to minimise any potential harm, including breaks in the pile-driving phase of construction.

As well as providing renewable energy, wave farms can help protect coasts against erosion by reducing the force of waves. However, it remains unknown whether they can provide this complementary service under future climate change when sea levels will be higher. A new study, based upon computer simulations, concludes that a wave farm off the south coast of Spain could indeed protect the coastline under higher sea levels, and cause the local beach to grow in size after storms.

Understanding the role of neighbourhood networks in encouraging farmers to participate in Payments for Ecosystem Services (PES) schemes is important as this can help to create local patterns of high and coordinated uptake of PES schemes, and thus an impact on ecosystem protection at a wider, landscape level. This is the outcome of a recent UK study, which found that neighbourhood networks were particularly important for small, remote communities.

Public support grows for wind farms if they are located away from recreational areas and if they are either fully or partly owned by organisations within the local community. In addition, Swedish consumers would accept bigger bills for electricity generated by wind power if the local population were heavily involved in wind farm planning, a recent survey suggests. This article was updated 30.09.14 to correct an error in the cost of the REC scheme.

An increasing number of US adults are using marijuana, as fewer people perceive the drug as harmful, according to a survey of over 500000 US adults conducted between 2002 and 2014 published in The Lancet Psychiatry. As marijuana has become increasingly potent over the past decade, the authors say that the findings suggest the need for improved education and prevention messages regarding the risks of marijuana.

read more

Travelling by coach or train has a lower impact on the climate than travelling by air or car, but using a small diesel car to carry several passengers can have similarly low impacts per person, new research suggests. Air travel is the worst form of transport, in terms of global warming impact, the researchers found, but the average percentage occupancy of a mode of transport significantly affects the impact per passenger.

Subsidies support economic sectors and grant advantages to consumers, but can harm the environment. A new study has tested a number of existing tools for assessing environmentally harmful subsidies (EHS), developed a comprehensive methodology for identifying and analysing EHS and highlighted opportunities for reforming them.

Despite the contribution that large-scale, intensive agriculture has made to global food production, food shortages still occur with particularly severe consequences for the poor. More investment in locally-led, small-scale farming would help ensure longer-term food security for the world’s most vulnerable under a changing climate and bring environmental benefits, according to a recent analysis of adaptation work in Uganda.

A new tool has been developed to map the sensitivity of seabirds to offshore wind farm development. The Seabird Mapping and Sensitivity Tool (SeaMaST), currently for use in English waters, combines information on the sensitivity of seabird species to wind turbines with data on the birds’ distribution. It provides maps that can be used for both the offshore wind farm industry and marine spatial planning.

‘Network bridging organisations’, such as farmer unions, Regional Nature Parks and Local Action Groups, promote cooperation between farmers, non-state collective actors and state actors under the Common Agricultural Policy. This study finds that farmers who have regular contact with these organisations show a higher commitment to long-term practice change. This could represent an opportunity to improve the effectiveness of payments for environmental services in Europe.

Monitors in showers, which display how much water is being used and sound an alarm when a limit is reached, have significantly cut water consumption in household trials. The immediate feedback from the alarm monitor made consumers more aware of their behaviour, which they could then modify.

Farmers have collaborated with scientists in France to evaluate agri-environmental measures that reduce soil erosion and surface water pollution at a catchment level. The exercise helped the farmers understand the benefits of the measures and provides an example of how policymakers could engage with stakeholders under the Water Framework Directive (WFD).

A recent study compared the decentralised treatment of pharmaceutical contaminants in wastewater at hospitals with centralised treatment at conventional and upgraded wastewater plants. The results suggest that additional (post) treatments may not always provide significant benefits.

Wetland biodiversity may fall under climate change, a new study suggests. The researchers' experiments indicated that, overall, plant growth in wetlands will be boosted, but a small number of plant species well suited to the warmer conditions will out compete other species. However, climate change's effects on biodiversity may be less severe if plants are able to move to cooler locations, towards the poles.

Small, artificial wetlands can reduce river pollution by trapping soil and nutrients swept off agricultural land by rainfall, a recent study finds. The researchers recommend that they are used as a back-up option to soil management measures also designed to reduce runoff into rivers.

By 2070, there may be insufficient water for irrigation to ensure yields and profitability for some crops currently grown in northern Germany - if the IPCC´s worst case climate change scenario becomes a reality - new research warns. To reduce future demand for water under a changing climate, the study suggests that farmers grow different crops and change their management practices.