Heat waves are predicted to become more frequent under climate change, and are likely to be particularly severe in cities and towns due to the Urban Heat Island effect (UHI). A recent UK study of UHI mitigation strategies has demonstrated that even a small urban river can result in a cooling effect of 1??C during temperatures higher than 20??C, and that these cooling effects can be improved by careful urban design of the surrounding areas.

Even small areas of semi-natural vegetation, farmlands and abandoned farmlands provide important ecosystem services in urban environments. However, there is widespread loss of these non-urbanised areas (NUAs) owing to poor planning and urban sprawl. A new five-step process has now been developed that can inform effective planning to protect and enhance the value of urban green spaces.

Researchers in Berlin have demonstrated that urban wasteland areas can be used as suitable habitats for a range of grassland species. Using simple and cost-effective measures to sow grassland seed mixtures, they found that such areas flourished despite poor soil conditions and high levels of impact from people.

The impact of polluted urban soil on trees is highlighted in a recent study from Latvia. The researchers found that high salt levels from de-icing chemicals and nutrient imbalance in soil damaged lime trees growing in the city of Riga.

A recent study has revealed how water use has changed across the world over the last 60 years. Growing populations and economic development, particularly in newly-emerging countries, have increased water demand, but technological developments have led to water efficiencies and savings, which moderate these demands.

Research into mercury has identified two genes in bacteria that appear to be required for turning the metal into its most toxic form, methylmercury. The study adds to a growing body of research that helps us to understand the transformations that mercury undergoes in the environment and the microbes involved in these transformations.

Green roofs have the potential to significantly reduce road traffic noise in the urban environment, according to a new study. The results suggest that greening of roofs and walls with materials suitable for growing plants softens the urban environment keeping sound levels low, whereas hard, manmade structures tend to amplify traffic noise.

Trees form a valuable part of green infrastructure in cities by helping reduce surface water runoff, recent research finds. Together with grassy areas, significant reductions in surface water flows can be achieved by planting trees, reducing the risk of floods.

Density in the urban environment can encompass a multitude of factors such as population or dwelling density or the density of green areas. A new study surveyed professionals regarding how decisions on urban density are made, and has revealed that many feel that developers make most of these decisions, but that local authority planners should have more influence.

Urban water use increases with a population’s average income, finds a study of a stressed river basin in Spain. Consumption also increases with population age, but falls as education levels rise. Such information could help municipal water providers predict future water trends and to develop appropriate measures by which to manage demand. There is huge interest in mining polymetallic nodules in deep-sea environments. These bumpy rocks on the seafloor contain highly valuable materials including manganese, iron, cobalt, nickel and copper.

While cities worldwide are expanding so is the significant carbon dioxide footprint of urban transport. Consequently, there is an urgent need for sustainable urban mobility solutions. A thorough analysis of the variables and dynamics of urban mobility in cities can aid in planning sustainable mobility policy. This study used a new system of classification by type (typologisation) relevant to urban mobility in global cities, with data from 331 cities in 124 countries covering 40% of the global urban population (as of 2016).

Groundwater is the earth’s largest freshwater resource and is vital for irrigation and global food production. In dry periods farmers pump groundwater to water crops, this is already happening at an unsustainable level in many places — exceeding the rate at which rain and rivers can refill the groundwater stores. This study seeks to identify where groundwater pumping is affecting stream flows and estimates where and when environmentally critical stream flows — required to maintain healthy ecosystems — can no longer be sustained.

A new study has investigated the possibility of a regional industrial symbiosis of metal industries across the Sweden-Finland border. The analysis suggests that it is technologically feasible, but that regulatory support may be inefficient, particularly with respect to changing the status of a waste product to a by-product.

A new study has shed light on the sustainable credentials of bio-based plastics. It indicates that, as yet, no bio-based plastics are sustainable, owing to practices including pesticide use. However, this could change with further technological development.

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.

New research has produced a starch-based bioplastic with similar properties to equivalent traditional oil-based plastics. By adding an ammonium salt to thermoplastic starch (TPS) the study demonstrated an improvement in the plasticisation process, rendering it flexible, mouldable and potentially recyclable.

Misreported fishing catches in the Baltic Sea have probably led to incorrect fishing quotas, new research suggests. The study found that total catches between 1996 and 2009 have been underestimated for a significant period, skewing quota calculations.

Many citizens living in the countries surrounding the Baltic Sea consider the Sea to be an important recreational area but are concerned about its environmental status, with regard to litter, biodiversity loss, heavy metals and hazardous substances, oil spills and algal blooms. These are the findings of a survey of 9000 citizens, which indicates widespread support for the polluter pays principle to tackle environmental problems in the Baltic Sea.

Higher public awareness of sustainable fishing practices, led by environmental NGOs, may have helped reduce the incidence of mislabelled fish in the UK, compared to Ireland, according to a recent study which assessed levels of fish fraudulently sold as ‘cod’ in these two countries.

There is an ongoing debate over exploitation of the Dutch Wadden Sea, over issues including gas extraction and cockle fishing. According to a review analysing interactions between scientists and policymakers during these debates, the productivity of such discussions is substantially influenced by the policy setting, i.e. the level of government involved and the key decision-makers.

A new tool to help environmental managers make faster, more evidence-based decisions on how to eradicate alien aquatic species has been developed. The tool is a statistical model based on over 140 management case studies in the scientific literature. Packaged as a user-friendly computer program, it allows different management options to be easily compared.

Simply supplying more scientific information on the environment may not be enough to persuade urban planners to give greater consideration to the environment, suggests new research. The Dutch study suggests that environmental values also need to be made more important to municipal decision makers.

A map of science could assist research planning strategies by helping to identify emerging topics. The map — which is based on links to almost 20 million scientific articles that have been published over the past 16 years — clusters and links scientific disciplines by citation-based relationships and serves as a highly detailed and scalable infographic. The authors hope it will be used by research planners to help distinguish — and potentially forecast — the research areas in science which have longevity, and also those which are innovative.

Alien plant invasions can have significant environmental, ecosystem and economic implications. Since ornamental horticulture is the primary pathway for invasive alien plant introductions, it is a suitable focus for prevention policies. A recent review of published evidence has examined the effectiveness of four major instruments: pre-border import restrictions, post-border sales bans, industry codes of conduct, and consumer education. The study highlights that, while each instrument has the potential to contribute to a reduction in plant invasion risk, none is sufficient to achieve this goal alone. The researchers, therefore, describe how the four instruments can be integrated along the ornamental horticulture industry supply chain to reduce risk more effectively, and outlines the role that government, industry and other stakeholders must play to achieve this goal.

Tightly compacted cities can increase flooding risk for local residents, but sprawling, suburban development can lead to major losses in carbon stored by the land and agricultural production. These are the conclusions of a study which explored the effects of different urbanisation patterns on vital ecosystem services.

New research has investigated the combined impact of climate change and land cover change on external household water consumption and local night-time temperatures. It estimates that a 3ºC rise in temperature combined with a high degree of urban sprawl would increase water consumption by 4,061 litres per household for the month of August due to increases in evaporation from ground surface. The study recommends full integration of land use planning and water management.

As society changes, it places new demands on its surroundings. New research has found that some EU countries are better able to manage the undesirable expansion of cities, the concept known as ‘urban sprawl’, because they have a flexible spatial planning policy that can easily adapt to changes. Urban sprawl is a term used to describe the expansion of residential suburbs around city centres, driven by peoples’ desire to live in larger houses and the ease of transport made possible by cars.

A set of guidelines has been developed to reduce soil erosion by planting vegetation in desertification hotspots.Farmers and policymakers can use the guidelines to identify the most suitable places to plant vegetation in the channels where water and sediment move through the landscape.

Under pressure from rising food prices, many nations have begun to acquire large tracts of agricultural land in foreign countries, a practice known as ‘land grabbing’. New research has now quantified current levels of land grabbing and demonstrated that it is accompanied by concerning levels of ‘water grabbing’ which could affect water supply in the ‘grabbed’ countries.

Even small areas of semi-natural vegetation, farmlands and abandoned farmlands provide important ecosystem services in urban environments. However, there is widespread loss of these non-urbanised areas (NUAs) owing to poor planning and urban sprawl. A new five-step process has now been developed that can inform effective planning to protect and enhance the value of urban green spaces.

Researchers in Berlin have demonstrated that urban wasteland areas can be used as suitable habitats for a range of grassland species. Using simple and cost-effective measures to sow grassland seed mixtures, they found that such areas flourished despite poor soil conditions and high levels of impact from people.

There is a growing demand for new settlements in and around urban areas due to social, economic and population factors. However, this can lead to the loss of agricultural land and green spaces that provide essential ecosystem services and contribute to the wellbeing of local people. Several countries, such as the UK and Germany, have attempted to limit the growth of urban areas by encouraging the redevelopment of brownfield sites.

Using electric fans to relieve high levels of heat and humidity may, surprisingly, have the opposite effect for seniors, a study by UT Southwestern Medical Center heart specialists suggests.

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Acute exacerbations of chronic obstructive pulmonary disease, or COPD, are associated with significant long-term lung function loss, according to research published online, ahead of print in the American Thoracic Society's American Journal of Respiratory and Critical Care Medicine.

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This year, the U.S. reported for the first time that a patient had been infected by bacteria resistant to colistin, an antibiotic of last resort. The announcement followed several years of warnings that current antibiotics aren't diverse enough to fight pathogens as drug resistance spreads. The cover story of Chemical & Engineering News (C&EN), the weekly newsmagazine of the American Chemical Society, sums up how researchers are trying to stay ahead of the bugs.

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Excess nutrients in sea water can cause eutrophication, a major environmental concern. Shellfish species such as mussels can ‘soak up’ some of these nutrients. A recent Swedish study examines the cost-effectiveness of mussel farming in the Baltic Sea as a method of reducing nutrient concentration and compares its potential with other methods of combating eutrophication.

A new global study is the first to quantify the potential of water management strategies to increase crop production. It indicates that a combination of harvesting run-off water and reducing evaporation from soil could increase global crop production by 20 per cent.

New research has indicated that the design of a high proportion of agri-environmental policy measures in seven EU countries was based on common sense judgments about their possible impact. Only a sixth of the measures studied were based on well-tested quantitative models of their relationship to the environment.

Reindeer herding has a long history in the Arctic, but climate change and industrial activity are bringing this important economic and cultural tradition to breaking point. In a unique initiative, reindeer herders across the Arctic are leading an international team of scientists in using modern technology to adapt to global change and empower indigenous communities.

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.

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.

A global cropland percentage map and a global field size map have been created for the first time to guide scientists and policymakers interested in global agricultural modelling and assessment. Both maps are for the baseline year 2005 and combined multiple data sets from global, regional and national levels to achieve a high level of accuracy and 1 km2 resolution.

Children are thought to be at greater risk from exposure to environmental pollutants than adults because their bodies are still developing and their lower body weight means that relative exposure is higher. A new study reports background exposure levels in German children aged 3-14.

The discomfort associated with hot, dry summers in some urban areas can be reduced by planting the most appropriate trees in open city spaces, according to a recent study. The researchers identified the Indian laurel fig as the most effective tree for this purpose in the Greek city of Chania.

Despite the health benefits they bring, the trees and shrubs in our cities can cause health problems for pollen allergy sufferers. Now, a study by Spanish researchers has proposed guidelines for urban planting to reduce the effects of pollen on city-dwellers.

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.

Dry soils and a lack of cloud cover help explain a major heatwave in France, concludes new research. The study indicates that the two drivers were separate, unlinked events that came together at the same time to worsen the 2006 heatwave. Its findings could allow heatwaves to be predicted more accurately to protect public health.