Animals that make the water their home are uniquely sensitive to changes in their liquid world. Oysters are very good at filtering dirty water, and crayfish are very sensitive to changes in water quality. Now scientists in the Czech Republic are using these sensitive bottom dwellers to monitor water quality in a business where clean water matters. VOA's Kevin Enochs reports.
Catalan leader Carles Puigdemont says the region has won the right to demand an independent state after Sunday's controversial referendum on independence. Spain's government has banned the vote it declared unconstitutional and has sent police and riot forces to stop the balloting. Clashes between the police and voters left hundreds of people injured. VOA's Zlatica Hoke reports.