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Using data from five developed countries — the UK, the USA, Norway, Italy and Belgium — food consumption trends are examined. The movement towards healthier eating (internationally) is documented and discussed, and underlying factors which influence the consumer are mentioned. The five countries selected demonstrate many of the typical characteristics of the developed world's eating habits. Probable future trends are listed.

The aim of this paper is to assess how the indicator sets presently used to monitor sustainable development in the European Union (EU) and Latvia reflect resource consumption and the production and use of anthropogenic substances.

The study was conducted by analyzing different sources as well as statistical information on development character in Latvia and human impact at first in respect to use of chemicals.

Many of the analyzed sustainable development indicators related to resource consumption interpret a reduction in consumption as a negative phenomena and thus contradictory to sustainability. The only relevant EU and Latvian indicator related to the use of anthropogenic substances is production of toxic chemicals. The EC Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) regulation is being implemented in the EU in an attempt to ensure the safety of chemicals through the whole chemical supply chain.

A sustainable development indicator should consider the decrease in resource consumption as a positive trend. As an important aspect at the assessment of sustainability is monitoring of use of chemical substances. In Latvia, the information on production, import, distribution and use of chemical substances is dispersed between several institutions and thus an overall picture is lacking. As the REACH regulation requires registration of chemical substances exceeding certain quantities, there is a necessity to elaborate an approach to identify such substances. Enterprises that already provide data on chemicals to responsible authorities are important for a targeted enforcement of REACH requirements in Latvia. The existing approach of chemical substance management represents an attempt to manage point sources of anthropogenic substances with little attention being devoted to the more numerous small diffuse sources, which could be the hidden part of the iceberg. The limited access to compiled data on chemical substances within REACH makes it difficult to use it as a warning sign in political or public discussions regarding one of the central aspects of sustainability.

One of the main risks to global sustainability is the exceedance of the Earth's carrying and assimilative capacity through excessive resource consumption and anthropogenic loading. In the analyzed EU and Latvia, sustainable development indicator sets the reduction in consumption is frequently interpreted as a negative trend thus making the overall assessment regarding resource consumption inconclusive. As long as gross domestic product as a major indicator for macro‐economic activity does not reflect environmental sustainability and well‐being and society does not adequately value natural and human resources and until more comprehensive indicators are developed which better take into account social and environmental aspects, striving for economic growth will be the main cause of resource overconsumption.

This paper aims to determine trends in office building electricity use in New Zealand.

The research examined Property Council of New Zealand annual operating expense survey data for the period 1990‐2008 and identified trends in both electricity expense and consumption per square metre.

Electricity consumption was surprisingly stable over the study period and electricity expenditure per square metre decreased in real terms until very recently. There were some significant differences in the level of consumption between different quality buildings and different locations but the trends were the same.

The findings revealed major problems in the accuracy and extent of electricity use data collected.

Globally the built environment has been assessed as accounting for 40 per cent of energy consumption. While New Zealand generates most of its electricity from sustainable hydroelectric sources, there are limited opportunities to expand such generation. As a result, the NZ government has been promoting energy efficiency as a means to reduce growth in electricity demand. Efficiency policies relating to office buildings have recently been proposed, but few benchmark figures are available on which to base such policies.

Little research of this nature has occurred in New Zealand previously and it is necessary to establish benchmarks against which improvements in the sustainability of buildings can be measured. It is also important to identify problems in data collection so that benchmarks are robust.

Approximately 700 colleges and universities have committed to climate neutrality, which will require significant reductions in energy consumption. This paper aims to explore the effectiveness of an Annual Energy Challenge in curtailing electricity use by changing consumption behaviors at one liberal arts college.

From 2010 to 2014, Allegheny College (Meadville, PA, USA) ran four-week energy challenges. Electricity consumption was measured and compared to a baseline year of 2008. An alternate baseline, more granular data for 20 sub-metered buildings and historic utility bill consumption trends were further analyzed to identify any persisting change and understand the impact of behavior change separate from efficiency retrofits, changes in population and normal seasonal shifts.

Electricity consumption during the challenge period dropped an average of 9 per cent compared to the 2008 baseline and 6 per cent compared to the baseline of the 4 weeks preceding each challenge. Consumption trends changed in the years during challenge implementation compared to the years before engaging the campus community. All analyses reinforce that the challenge reduces electricity consumption. However, results must be analyzed in multiple ways to isolate for behavior change.

The analyses used to isolate energy challenge results due to behavior change are replicable at other institutions and would allow campuses to compare results and share proven strategies.

While many campuses organize energy challenges, few have published details about the results both during the challenge and continuing afterwards. Nor has a research explored the need to put results into contexts such as natural seasonal trends to isolate the impacts of behavior change.

Accurate prediction of seasonal power consumption trends with impact disturbances provides a scientific basis for the flexible balance of the long timescale power system. Consequently, it fosters reasonable scheduling plans, ensuring the safety of the system and improving the economic dispatching efficiency of the power system.

First, a new seasonal grey buffer operator in the longitudinal and transverse dimensional perspectives is designed. Then, a new seasonal grey modeling approach that integrates the new operator, full real domain fractional order accumulation generation technique, grey prediction modeling tool and fruit fly optimization algorithm is proposed. Moreover, the rationality, scientificity and superiority of the new approach are verified by designing 24 seasonal electricity consumption forecasting approaches, incorporating case study and amalgamating qualitative and quantitative research.

Compared with other comparative models, the new approach has superior mean absolute percentage error and mean absolute error. Furthermore, the research results show that the new method provides a scientific and effective mathematical method for solving the seasonal trend power consumption forecasting modeling with impact disturbance.

Considering the development trend of longitudinal and transverse dimensions of seasonal data with impact disturbance and the differences in each stage, a new grey buffer operator is constructed, and a new seasonal grey modeling approach with multi-method fusion is proposed to solve the seasonal power consumption forecasting problem.

The highlights of the paper are as follows:

1. A new seasonal grey buffer operator is constructed.

2. The impact of shock perturbations on seasonal data trends is effectively mitigated.

3. A novel seasonal grey forecasting approach with multi-method fusion is proposed.

4. Seasonal electricity consumption is successfully predicted by the novel approach.

5. The way to adjust China's power system flexibility in the future is analyzed.

A new seasonal grey buffer operator is constructed.

The impact of shock perturbations on seasonal data trends is effectively mitigated.

A novel seasonal grey forecasting approach with multi-method fusion is proposed.

Seasonal electricity consumption is successfully predicted by the novel approach.

The way to adjust China's power system flexibility in the future is analyzed.

The main trends in food consumption per capita unearthed so far from the Census and other material may be briefly summarized. Only for the meats – pork, beef, and veal – have the estimates been carried back to 1840. It seems not impossible that wheat flour may be extended before 1880, and possibly even the series for dairy products before 1870. In these cases, however, prudence has to date prevailed.

Non-fossil fuels are receiving increasing attention within the context of addressing global climate challenges. Based on a review of non-fossil fuel consumption in major countries worldwide from 1985 to 2015, the purpose of this paper is to analyze trends for global non-fossil fuel consumption, share of fuel consumption and inequality.

The similarities were obtained between the logarithmic mean divisia index and the mean-rate-of-change index decomposition analysis methods, and a method was proposed for complete decomposition of the incremental Gini coefficient.

Empirical analysis showed that: global non-fossil fuel consumption accounts for a small share of the total energy consumption, but presents an increasing trend; the level of global non-fossil fuel consumption inequality is high but has gradually declined, which is mainly attributed to the concentration effect; inequality in global non-fossil fuel consumption is mainly due to the difference between nuclear power and hydropower consumption, but the contributions of nuclear power and hydropower to per capita non-fossil fuel consumption are declining; and population has the greatest influence on global non-fossil fuel consumption during the sampling period.

The main contribution of this study is its analysis of global non-fossil fuel consumption trends, disparities and driving factors. In addition, a general formula for complete index decomposition is proposed and the incremental Gini coefficient is wholly decomposed.

The purpose of this paper is to advance the understanding of wine by the glass (WBG) consumption as a new growing trend in wine consumption. To this end, the roles of risk perception, wine involvement and variety seeking are investigated in determining WBG purchase intentions.

Two studies based on a scenario-based survey have been conducted. In Study 1 (n=248), the relationship between WBG risk perception and WBG purchase intention mediated by variety seeking is tested. In Study 2 (n=200), the relationship between wine involvement and WBG purchase intention with the mediating role of variety seeking is analysed.

Results show that variety seeking plays a key role in determining WBG purchase intentions considering both WBG perceived risk and wine involvement as independent variables.

The study advances the literature on WBG consumption by enclosing the psychological mechanism (i.e. variety seeking) behind consumers’ WBG purchase intentions. The main limitation of this study lies in it being conducted in a single country (i.e. Italy).

This paper provides useful guidelines for wine managers. Specifically, variety seeking can attract consumers in new wine-consuming places based on a rich assortment. Moreover, it can present a challenge to wine producers in creating brand loyalty.

Although WBG is a growing trend in wine consumption, empirical studies are still scant and a deeper comprehension of its antecedents and consequences is needed. By showing variety seeking as the mechanism behind WBG consumption, this study offers a new theoretical explanation of this phenomenon.

The purpose of this study is to analyze the natural gas sector in Italy, with a specific focus on the regulatory framework, the development of infrastructures and the supply and demand balance.

The research has been developed by applying qualitative and quantitative methodologies. In particular, a review and a qualitative analysis have been proposed to analyze the regulatory framework and the development of infrastructure, whereas the consumption trend is quantitatively examined by means of the decomposition analysis.

This study highlights how the legislation is complete and in line with European Union (EU) prescriptions, and how the infrastructure is quite well-developed, even though many expected developments are on hold due to the current market conditions. The supply and demand balance highlights a decreasing trend of the consumption owing to the aggressive development of renewables and permanence of a weak economic growth. Finally, the decomposition analysis of total and sectorial natural gas demand has emphasized that the increase of energy intensity can be considered responsible for a large share of consumption between 1995 and 2014.

The paper details the status of the natural gas sector in Italy, which is one of the largest consumers of natural gas within the EU. Despite its importance, the Italian natural gas sector has not been subjected to extensive research, and this paper represents a first attempt to provide an overview of the sector.