B2 any basic substance that is used in or produced by a reaction involving changes to atoms or molecules:
The government has pledged to reduce the amount of chemicals used in food production.
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- They use special chemicals to accelerate the growth of crops.
- Organic chemicals are used in the manufacture of plastics, fibres, solvents and paints.
- The body produces chemicals that are natural painkillers.
- Toxic chemicals continue to be dumped in the North Sea.
- Many chemicals have a damaging effect on the environment.
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B2 relating to chemicals:
The chemical industry produces such things as petrochemicals, drugs, and rubber.
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- Sodium chloride is the chemical name for common salt.
- All chemical weapons facilities will be deactivated.
- Estimates of the amount of money needed to decontaminate the heavily polluted chemical installations vary.
- We had to learn chemical formulae at school, but I can only remember H2O for water.
- The chemical properties of coal are still incompletely understood.
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