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Two hundred-twenty-five million trees dead in the southwest in a 2002 drought. Three hundred million trees in Texas in 2011. Twelve million this past year in California.  Throughout the world, large numbers of trees are dying in extreme heat and drought events. Because mass die-offs can have critical consequences for the future of forests and the future of Earth’s climate, scientists are trying to understand how a warming climate could affect how often tree mortality events occur – and how severe they could become.

Cerca de una décima parte de las emisiones de gases de efecto invernadero globales generales de la agricultura podría relacionarse a los residuos de alimentos a mediados de siglo, según un estudio reciente. Un equipo del Instituto de Potsdam para la Investigación del Impacto Climático, por primera vez ofrece proyecciones integrales de pérdida de alimentos para los países de todo el mundo también calculando las emisiones asociadas. Actualmente, un tercio de la producción mundial de alimentos no llega a nuestros platos. Esta proporción aumentará drásticamente, si los países emergentes como China e India adoptan estilos de vida occidentales de nutrición, según los análisis muestran. La reducción de los residuos de alimentos ofrecería la oportunidad de garantizar la seguridad alimentaria, lo que es bien conocido. Sin embargo, al mismo tiempo, podría ayudar a mitigar el cambio climático peligroso.

Sustainability is a word tossed around much these days. But do consumers really care about buying sustainably? The answer is yes. More and more consumers are interested in sustainability, as surveys show.  A 2011 consumer survey by Nielsen found that 66 percent of socially-conscious consumers cited environmental sustainability as the most important issue from a list of 18 issues.

So, how do you increase awareness of buying sustainably among consumers? The key is getting information to them. A study by Michigan State University researchers, published in 2014 in the Business and Economics Journal, looked at consumer awareness of fair trade information. The researchers found that informed consumers “are better positioned to make sound decisions and take the appropriate actions to address sustainability issues.” Providing access to “complete and accurate sources of information allows consumers to draw the connection between their consumption behaviors and social, and environmental sustainability,” the researchers concluded.

Disastrous floods in the Balkans two years ago are likely linked to the temporary slowdown of giant airstreams, scientists found. These wind patterns, circling the globe in the form of huge waves between the Equator and the North Pole, normally move eastwards, but practically stopped for several days then -- at the same time, a weather system got stuck over Bosnia and Herzegovina, Serbia and Croatia that poured out record amounts of rain. The study adds evidence that so-called planetary wave resonance is a key mechanism for causing extreme weather events in summer. Further, the scientists showed that extreme rainfall events are strongly increasing in the Balkans, even more than the globally observed rise.

"We were surprised to see how long the weather system that led to the flooding stayed over the region -- it's like the Vb cyclone 'Yvette' was trapped there," says Lisa Stadtherr from the Potsdam Institute for Climate Impact Research (PIK), lead-author of the study to be published in Science Advances. "Day after day the rain was soaking the soil until it was saturated, which lead to the flooding that reportedly caused several dozen casualties and 3.5 billion Euro of damages."

What if we could not only clean up the heavy metals in our water systems, but also recycle those metals and reuse them?

A new study from the Institute for Intelligent Systems in Germany and the Institute for Bioengineering of Catalonia in Spain suggests that, soon, we might be doing just that.