Some scientists have proposed adding chemical tracers to fracking fluids as a way of confirming that any contamination of drinking water comes from the drilling process.

BBC: Fracking: Untangling fact from fiction

They then triggered them into action using a chemical called an interleukin, or cigarette smoke before adding resveratrol.

BBC: NEWS | Health | Red wine 'may treat lung disease'

"We are following all leads concerning chemical weapons, " the foreign minister said, adding that the consolidation was a measure to assuage fears that such weapons could end up in "the wrong hands, " the agency reported.

CNN: Russia: Syria consolidates its chemical weapons