The most controversial aspect of biofuels is the perceived competition for farmland. Will advances in biofuels and agriculture send this trade-off speeding towards the history books?
Biofuels have been hailed as key to reducing our fossil-fuel dependence, yet their environmental and social impacts remain uncertain. A complex task lies ahead for policy makers.
Thirty five years of experience has taught one of the world's leading biofuels producers several essential lessons, which other countries should heed, says Marcia Moraes.
Many of us were raised or currently live in an urban environment. A neuroimaging study now reveals how this affects brain function when an individual is faced with a stressful situation.