• Highway repair fund, paid for with gas-tax revenue, is nearly depleted.
• Want to put stinkweed in your tank?
• Climate change could harm giant sequoias.
• Engineers unveil new generation of tidal turbines.
• Power outages from hurricanes hamper gasoline production.
• Iraqi marshes thought to be site of Garden of Eden will be a World Heritage Site.
&bull Pyrenees glaciers may melt by 2050.