The International Maritime Organisation (IMO) said it would consider changing the classification of a substance, but added it was "only a facilitator".

BBC: Richard Drax MP to question government over bird pollutant

"My view is that I focus less on sound bites and more on substance, " he added.

WSJ: Candidates Skirt a Political Circus

They are working with the Farmwatch scheme in the Test Valley to introduce a liquid substance which can be added to fuel to "chemically tag" it.

BBC: Heating oil 'tagged' to tackle rural theft in Hampshire

However, Mr Crawford hit back saying the government "fully respects the rights of employees to remove their labour", and said the government had sympathy with the substance of the concerns of public sector workers and added the "UK government approach to pension reform is wrong".

BBC: Bureau motion and decision time

So Glaxo added adjuvants, substances that bolster immune response, including a bacterial wall extract and a detergentlike substance from the soapbark tree.

FORBES: Booster Shot

He added jazz to his critical portfolio two years later, publishing some of the first essays of substance about such now-legendary artists as Bix Beiderbecke, Duke Ellington and Benny Goodman.

WSJ: Otis Ferguson: A Film and Jazz Critic Still Waiting for His Due | Sightings By Terry Teachout