Most biofuels are not 'green', researchers show

(Phys.org)—First tops, then flops. That is one way of summing up the history of biofuels so far. A new study led by Empa gives an up-to-date picture of the ecobalance of various biofuels and their production processes. ...

Steroids may persist longer in the environment than expected

Assessing the risk posed to aquatic organisms by the discharge of certain steroids and pharmaceutical products into waterways is often based on a belief that as the compounds degrade, the ecological risks naturally decline.

Defining and measuring sustainability

Back in 2009 when I was completing my book Sustainability Management and preparing it for publication by Columbia University Press in 2010, I was also working with colleagues at Columbia's Earth Institute and School of Continuing ...

Work needed to make algal biofuel viable, study suggests

(Phys.org)—Though biofuels from algae hold great promise, Cornell researchers find that more innovation is needed to make the technology economically and energetically viable at a commercial scale.

Understanding the dynamics of crowd behavior

Crowds formed from tiny particles disperse as their environment becomes more disordered, according to scientists from UCL, Bilkent University and Université Pierre et Marie Curie.

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