At least 2,000 have left to join rebel groups in Syria, dividing families from Berlin to London and creating a new security threat for the West.
The energy in biofuels can match the levels of crude oil, researchers from the University of Twente in the Netherlands have found. But there are some inherent limits on using biofuels at a commercial scale.
Three states jumped into online gaming last year with high hopes. But so far their take is very low. The inherent problems in this addictive form of gambling should give pause to other states and to Congress if they are tempted to follow suit.