The chemical sector in the United States contributes 25% to GDP.

New research from the US National Academies estimates that by 2020, the chemical sector in the United States will have generated $5.2 trillion (£4.3 trillion) in economic output and employed 4.1 million people. A committee led by Mark Wrighton, a chemist and the current president of George Washington University, spent two years compiling the study.

The chemical sciences accounted for £258.1 billion (or 20% of GDP) in the ....