New research has investigated the long-term effects of applying sewage sludge to Spanish soils. The results indicate that sludge enhances soil properties, but recommends a maximum dose of 40 tons per hectare, applied biannually. Above this level, it appears the soil properties will not improve and may even worsen.

Certain vegetables take up heavy metals from contaminated water used for irrigation, a new study finds. The researchers grew vegetables in greenhouses similar to field conditions in Greece and found that concentrations of nickel and chromium increased in potatoes and onions, but not in carrots, when irrigated with water containing contaminant levels similar to those found in industrial wastewater.

The widespread use of higher-yielding improved varieties of crops as part of the ‘Green Revolution’ has averted the conversion of between 18 to 27 million hectares of forests, woodlands and pastures in the period 1965 to 2004, according to a recent study. However, its authors caution that the relationship between these crops and land use change is complex, and good governance is needed to protect biodiversity from future expansion of agricultural land.

Adding compost, manure, and other forms of organic matter to farmland soil can boost earthworm numbers, crop yield, and the stability of soil, finds a recent analysis of long-term case studies. No-tillage and crop-rotation practices also have positive effects on soil, although no-tillage's benefits for earthworms are often absent on farms that use herbicides and other pesticides. The study also confirms that organic farming typically produces lower crop yields than conventional farming, but provides recommendations on how to reduce this ‘yield gap’, while highlighting positive aspects of organic agriculture.

Crop rotation is gaining increasing research- and policy attention as an environmentally friendly way to manage weeds. In such rotations, crops are introduced that release chemicals into the environment known to inhibit weed germination or growth (so-called allelopathic crops). Previous studies have identified Cynara cardunculus L., a perennial thistle, including varieties of globe artichoke and cardoon, as a potential allelopathic candidate. This study conducted field experiments using three botanical varieties of C. cardunculus to evaluate their effect on weeds within an ecosystem. The results confirm that C. cardunculus has an allelopathic effect in monoculture, reducing the amount of weed seeds present in soil. This paves the way for its inclusion in crop rotation as part of eco-friendly, sustainable weed-management strategies.

Monitoring the effects of chemicals in the human body provides useful data for assessing and managing environmental risks to health, but it also raises ethical questions about how the results of such studies should be reported to participants. New research suggests that changes are needed to the research process to allow study participants to play a greater role in interpreting, disseminating and using the results.

Scientists involved in a pan-European project to develop better methods of risk assessment say maps that show such cumulative risks geographically are easy to interpret and should be considered as practical tools for conveying risk information to decision makers and the general public.

The health risks to humans of using recycled water to irrigate crops needs to be carefully managed. New research has demonstrated that ???managed aquifer recharge??? can be just as effective as conventional water treatments in improving the quality of recycled water for use in irrigation.

Pollen allergy is a common cause of allergic respiratory diseases such as hay fever and asthma. A recent continent-wide study suggests that rising carbon dioxide (CO2) emissions over the last 30 years may be increasing pollen counts especially in European cities, which could have serious consequences for public health.

Increasing noise levels are a global environmental concern, and have been linked to important health issues, such as heart disease and cognitive development. New Danish research has now shown that it is also associated with an increased risk of diabetes.

People exposed to fine particle (PM2.5) and ozone pollution are at increased risk of suffering out-of-hospital cardiac arrests, according to a recent Finnish study. Cardiac arrest is more likely within 24 hours after exposure to PM2.5 and up to several days after exposure to ozone.

The worldwide decline of pollinators could increase cases of vitamin and micronutrient deficiencies in humans, new research suggests. For instance, pollination is needed for the crops that produce half of all plant-derived vitamin A across much of south-east Asia. Furthermore, areas which depend most on pollination for micronutrient supply tend to be poorer and already at higher risk of deficiencies.

Scientists have measured how children and pregnant women are exposed to over 120 environmental factors influencing our health — from air and noise pollution to green space and access to public transport. The study gathered and analysed data from six European countries to build a picture of the ‘exposome’ — the array of environmental factors that humans are exposed to from the moment they are conceived. A better understanding of the exposome could help us understand the role of the environment in the onset of various diseases, including cancer and other chronic disorders such as cardiovascular disease.

The presence of plastics in aquatic environments is a growing concern across the EU. This study explored the amount of microplastic particles present in raw and treated water at three water-treatment plants in the Czech Republic. While treated water contained fewer particles than raw1 fresh water, the amount found in treated water was not negligible, and largely comprised tiny particles of <10 micrometres (μm) in diameter. Ways to filter microplastics from potable water must be identified and their risk to humans, sources and routes into drinking water determined, say the researchers.

Product carbon footprinting (PCF) is an increasingly popular method of reporting sustainability impacts. There are a growing number of methodologies and labels addressing carbon footprints in Europe and worldwide, and PCFs are seen both as a way to better communicate and inform consumers and as a tool to reduce the global footprint related to production and consumption activities. The articles in this thematic issue of Science for Environment Policy explore the calculation and understanding of PCF, in order to guide effective policy.

Published to mark the 20th anniversary of the Habitats Directive, this latest Thematic issue examines the challenges and successes in managing and restoring biodiversity in the Natura 2000 network.

Nanomaterials – at a scale of one thousand times smaller than a millimetre – offer the promise of radical technological development. Many of these will improve our quality of life, and develop our economies, but all will be measured against the overarching principle that we do not make some error, and harm ourselves and our environment by exposure to new forms of hazard. This Thematic Issue explores recent developments in nanomaterials research, and possibilities for safe, practical and resource-efficient applications.

Energy efficiency is at the centre of EU policy for achieving a fundamental transformation of Europe’s energy systems by 2030. This Thematic Issue reveals the complexity of the issue of energy efficiency, its links with resource efficiency and the wide range of factors influencing it, from technology to social practices.

Managing landscapes effectively requires the involvement of a wide variety of stakeholders. The views and interests of these different groups can be effectively integrated by agri-environment 'collaboratives' — a type of bridging organisation which can be found in varying forms in Europe. Using data from Germany and the Netherlands, a study concludes that these groups make important contributions to landscape management, ranging from implementing policy to generating income.

A new study has assessed the annoyance caused by a combination of noises typically found on an industrial site. The results could help improve total noise annoyance prediction models. For example, it was found that ‘broadband’ noises, which consist of a wide range of frequencies, lead to more annoyance if they are combined with a specific additional set of low frequency noises, which can lead to an overall identical noise level.

Increasing noise levels are a global environmental concern, and have been linked to important health issues, such as heart disease and cognitive development. New Danish research has now shown that it is also associated with an increased risk of diabetes.

The noise generated by commercial shipping can impair the ability of the critically endangered European eel to avoid predators, new research has found. The results show that marine noise can have serious effects on these animals with potentially fatal consequences.

Methods for assessing the sustainability of tourist destinations have been developed. In a new Spanish study, researchers describe a framework for analysing sustainability that is designed for policymakers and tourism managers, and, as a case study, apply it to the region of Andalusia.

The lifetime environmental impacts of non-electrical consumer products, such as clothes, could be cut by over 40% if consumers maintained them in a more environmentally friendly manner, new research suggests. The study found the impacts of eco-designed products fell significantly when user guidelines were included in the eco-design.

A recent study has analysed risks to European renewable industries from the Chinese supply of critical raw materials. The offshore wind sector was found to be the most vulnerable of the renewable industries to supply risks. EU and industry strategies should be able to deal with these supply risks in the short term, but there are potential long-term risks to solar and wind sectors. The development of alternative technologies less reliant on these raw materials, and methods to recycle these materials is, therefore, a priority.

Risk analysis and technology assessment (RATA) involves assessing the possible human, environmental and societal risks of a novel technology at various stages of the development process. However, best practices for RATA’s successful incorporation into large-scale research programmes are still in development. In a recent study, researchers present a case study of their efforts to bring RATA into practice within a large Dutch nanotechnology consortium. By outlining the procedures and products they developed and reflecting on their experiences, the researchers provide valuable insights for the future integration of RATA in technology development projects. The findings are relevant to stakeholders with an interest in supporting the design of key enabling technologies, including governmental agencies and industrial partners.

Successful communication of climate change needs to be tangible, relevant and tailored to its audience, according to new research. The study established 10 key principles for effective communication using a brainstorming exercise between scientists and local government.

Adapting to climate change in coastal cities needs further development of the resilience approach as well as identifying how it can be practically used in local actions, according to a new study. The researchers present resilience as a flexible, practical way of dealing with climate change's impacts, such as coastal flooding, which can be easily built into adaptation measures.

Information policy measures aimed at reducing household energy consumption need to take a number of approaches, according to Swedish researchers. They should stress both economic and environmental motives and encourage public discussion.

Environmental impact studies which are conducted early on in the development of wave and tidal-power schemes allow the schemes' technology to be adapted to consider their impacts on marine ecosystems, according to a recent study which reports on a Swedish research wave park.

Miscanthus grass could have greater potential to mitigate greenhouse gas (GHG) emissions during cultivation than some other biofuel crops, such as switchgrass and corn, according to researchers. The study modelled how carbon and nitrogen circulate through ecosystems on a bioenergy farm, and estimated that miscanthus could provide a net sink of up to 350-428 g of CO2 per m2 per year during this stage of biofuel production.

Continuing economic development and public health measures are likely to outweigh the impact of climate change on malaria prevalence, according to new research. The research found that the prevalence of malaria has declined over the past century despite rising temperatures.

A recent study has examined the implications of CO2 leaking from storage sites under a variety of scenarios over 100,000 years. The findings suggest that ocean storage of CO2 (prohibited in the EU) would lead to long-term warming of the atmosphere, higher sea levels and acidification and dead zones in the ocean. In contrast, geological storage with low-leakage rates (1 per cent per 1000 years) would lead to conditions similar to a low-emissions future. This implies that

New research has predicted that, if current warming continues, an important type of coral in the central Red Sea could stop growing by 2070. Although the same coral has recovered after previous short-term warming events, it appears that the current continuing trend in warming is likely to be more damaging.

Tiny organisms called phytoplankton, which are crucial components of marine ecosystems, have been slowly disappearing over the last century, according to researchers. The decline is worrying because it may have profound effects on marine life, fisheries and carbon cycling. The study suggests the decline in phytoplankton could be linked to climate change.

During heatwaves, forests initially have a warming effect on surrounding air temperatures. However, in the longer-term they have a cooling impact, according to a recent study. This new information about plant contributions to temperatures will help further improve climate modelling.

The impact of climate change on electricity consumption is important to both adaptation and mitigation policies. New research has estimated that over the next 100 years climate change could cause up to a 20 per cent decrease in demand for electricity for heating in Northern Europe and up to a 20 per cent increase in demand for electricity for cooling in Southern Europe.

By 2080, parts of Germany could be susceptible to the spread of malaria for up to six months a year, according to new research. The study mapped areas at risk of an outbreak, considering predicted climate change-driven rise in air temperature and data on the spread of malaria.

The actual carbon footprint of products and services can differ considerably according to how energy used to manufacture the product was generated – for example, whether it was generated by fossil fuel or renewable sources. A recent US study has therefore recommended that differences in regional power supply should be acknowledged by life cycle assessments of products and services.

A new study has combined measurements of carbon dioxide (CO2) fluxes with estimates of other greenhouse gas (GHG) emissions from farming operations for 15 European crop sites over several years. It estimated that the sites lost on average 138g of carbon per m2 per year. The total GHG balance (including non-CO2 emissions) was equivalent to an average carbon loss of 203g of carbon per m2 per year.

Diverse agricultural systems can sustainably improve food security and supply a varied, healthy diet for people, according to a recent analysis of the benefits of agricultural biodiversity. The food-based approach, when integrated with other strategies, can be used to tackle malnutrition, micronutrient deficiencies and the impact of climate change on farming.

As wind power becomes more important in the energy mix, so too does the need to manage its variability. A new study has reviewed the options and indicates that, although state-of-the art technologies exist to maximise gains from wind power, they need proper and insightful management.

A recent study has assessed the sustainability of different nuclear cycle scenarios in Europe, and suggests trade-offs are required between reducing the amount of uranium fuel needed, costs and proliferation risks.

According to UK researchers, caution must be taken in the use of shale gas until more is known about its environmental impacts. Using US data, they estimated the additional emissions associated with the extraction of gas from shale compared to that of conventional sources and highlighted concerns from the US that extraction could bring significant risks of ground and surface water contamination.

A new report on biofuels by the UK’s Nuffield Council on Bioethics has produced a set of five ethical principles to guide the development of biofuels technology and policy. It recommends applying these principles to create comprehensive standards to ensure that biofuels address, rather than exacerbate, global problems.

New research investigating the effects of naturally occurring iron fertilisation in the sea suggests that large scale geoengineering projects designed to sequester carbon in the deep sea could have a dramatic impact on marine ecosystems. The study found that the organic matter arriving at the sea floor and the species that live there are very different, depending on whether waters are fertilised by iron leached from nearby islands or not.