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Robust relationship between yields and nitrogen inputs indicates three ways to reduce nitrogen pollution

Understanding the decline in nitrogen-use efficiency with increasing nitrogen inputs helps us understand the dilemma between increased agricultural production and nitrogen pollution, according to Benjamin Leon Bodirsky and Christoph Müller

A regional look at HANPP: human consumption is increasing, NPP is not

Steven Running reckons the regional trend in analysis of human appropriation of net primary production (HANPP) can quantify increasing vulnerability of the local populations to any shortfall in NPP as demand approaches supply, providing an early warning system

A growing commitment to future CO2 emissions

H Damon Matthews reckons we should account for the greenhouse-gas emissions committed to by exploring new fossil-fuel reserves, as well as those associated with building fossil-fuel energy plants

What are the physical links between Arctic sea-ice loss and Eurasian winter climate?

Ian Simmonds and Pallavi D Govekar examine new evidence on the connection between rapid Arctic sea-ice retreat and cold midlatitude winters

Can sediment plumes reveal ice-sheet melt rates?

The melting of ice sheets and glaciers contributes to sea-level rise, yet these frozen structures are often hard to study because they are so remote. Richard Hodgkins of Loughborough University, UK, details how sediment may be able to help

Heat and drought extremes likely to stress ecosystem productivity equally or more in a warmer, CO2 rich future

Considering that Earth system models generally miss a host of heat- and drought-induced mortality mechanisms that could exacerbate adverse carbon impacts, it is logical to expect that the impacts of today's heat and drought extremes are likely underestimates of what we can expect in the future with a high fossil emissions pathway, according to Christopher Williams

Identifying exposure disparities in air pollution epidemiology specific to adverse birth outcomes

Improved methods for measuring air pollution can help identify areas with disproportionately high exposure levels that lead to health inequities, according to Laura Geer

Heat and drought extremes likely to stress ecosystem productivity equally or more in a warmer, CO2 rich future

It is logical to expect that the impacts of today's heat and drought extremes are likely underestimates of what we can expect in the future with a high fossil emissions pathway, writes Christopher Williams

Identifying exposure disparities in air pollution epidemiology specific to adverse birth outcomes

Improved methods for measuring air pollution can help identify areas with disproportionately high exposure levels that lead to health inequities, according to Laura Geer

Overallocation, conflict, and water transfers

The paradox of pervasive overallocation may be that even as it heightens the need for water transfers, it also intensifies their collateral consequences, according to Dave Owen

Bias, complexity and uncertainty in ecosystem risk assessment: pharmaceuticals, a new challenge in scale and perspective

Risk assessment must expand its scale from the molecular and cellular to that of the ecosystem with real world conditions, say Lawrence K Duffy, Kriya L Dunlap and Anna R Godduhn

Water for animal products: a blind spot in water policy

Water-use efficiency in the food system as a whole remains a blind spot, according to Arjen Y Hoekstra, with national water policies focusing on "sustainable production" rather than "sustainable consumption"

Coastal subsidence and relative sea-level rise

Manmade subsidence may be the dominant contributor to relative sea-level rise in coastal environments where subsurface fluids are heavily exploited, according to S E Ingebritsen and D L Galloway

A new paradigm in oil-spill modelling for decision making?

Oil-spill models of intermediate complexity show great merit as a screening tool for decision making, according to Michel Boufadel and Xiaolong Geng

A temporary hiatus in warming of extreme temperatures is not unusual, nor inconsistent with model simulations of human-induced climate change

Michael Wehner examines trends in extreme temperatures during the warming hiatus

The real John Nye lecture: 65 years of glaciology

91-year-old physicist John Nye speaks at British Branch meeting of the International Glaciological Society

Crop heat stress in the context of Earth System modelling

Samuel Levis examines recent work on how best to evaluate crop heat stress during flowering

Has a warm North Atlantic contributed to recent European cold winters?

Noel Keenlyside and Nour-Eddine Omrani discuss the causes of northern hemisphere winter cooling.

Anthropogenic global warming threatens world cultural heritage

Marzeion and Levermann's inventory of the most vulnerable UNESCO world heritage sites under anthropogenic sea-level rise is a first step towards protection, says Anny Cazenave.

Clarifying anti-reflexivity: conservative opposition to impact science and scientific evidence

McCright et al. extend current research on conservatives' distrust of science by distinguishing between public trust in production versus impact scientists, says Riley Dunlap.