Hydraulic fracturing, also known as “fracking”, the divisive method of extracting natural gas from shale formations, should be approached with caution by countries seeking ways to increase access to energy, says a new UNCTAD report on shale gas.

Freshwater availability is changing worldwide. Here we quantify 34 trends in terrestrial water storage observed by the Gravity Recovery and Climate Experiment (GRACE) satellites during 2002–2016 and categorize their drivers as natural interannual variability, unsustainable groundwater consumption, climate change or combinations thereof. Several of these trends had been lacking thorough investigation and attribution, including massive changes in northwestern China and the Okavango Delta. Others are consistent with climate model predictions.

The African Statistical Yearbook (ASYB) 2018 is the tenth edition jointly produced by the African Development Bank (AfDB), the African Union Commission (AUC) and the United Nations Economic Commission for Africa (ECA). It is a result of the fruitful collaboration that exists among the three pan-African organizations within the field of statistics.

The projected demand of maize production in India in 2050 is 4–5 times of current production. With the scope for area expansion being limited, there is need for enhancement of yield. This calls for identifying areas where huge unrealized yield potential exists. With a view to address the issue, the present study delineates homogeneous agro-climatic zones for maize production system in India taking district as a unit and using the factors production, viz. climate, soil, season and irrigated area under the crop.

Tourism contributes significantly to global gross domestic product, and is forecast to grow at an annual 4%, thus outpacing many other economic sectors. However, global carbon emissions related to tourism are currently not well quantified. Here, we quantify tourism-related global carbon flows between 160 countries, and their carbon footprints under origin and destination accounting perspectives.

The World Health Statistics series is WHO’s annual snapshot of the state of the world’s health. This 2018 edition contains the latest available data for 36 health-related Sustainable Development Goal (SDG) indicators. It also links to the three SDG-aligned strategic priorities of the WHO’s 13th General Programme of Work: achieving universal health coverage, addressing health emergencies and promoting healthier populations.

Two billion workers — representing 61.2 per cent of the world’s employed population — are in informal employment. The third edition of this work provides, for the first time, comparable estimates on the size of the informal economy and a statistical profile of informality in all its diversity at the global and regional levels.

A bibliometric approach is used in this study for the assessment of greenhouse gas (GHG) research trends on a global scale. The relevant literature published from 2000 to 2014 in journals of all subject categories of the Science Citation Index Expanded from the Web of Science Core Collection databases has been used. The strings ‘greenhouse gas*’ or ‘green house gas*’ are used for retrieving data.

Microbial communities, associated with almost all metazoans, can be inherited from the environment. Although the honeybee (Apis mellifera L.) gut microbiome is well documented, studies of the gut focus on just a small component of the bee microbiome. Other key areas such as the comb, propolis, honey, and stored pollen (bee bread) are poorly understood. Furthermore, little is known about the relationship between the pollinator microbiome and its environment. Here we present a study of the bee bread microbiome and its relationship with land use.

An assessment of monthly data shows that in 2017, OECD net electricity production grew by 0.8% compared to 2016. There was a significant increase, 16.7%, in Geothermal, Solar, Wind and Other renewables generation and a marginal increase of Hydro by 0.5%. Combustible Fuels and Nuclear fell by 1% and 0.8%, respectively.