F-gas
F-gases can be found in refrigeration, air conditioning and aerosols and are powerful greenhouse gases that trap heat in the atmosphere and contribute to global warming
The Environmental Investigation Agency claims illegal trade has risen to meet demand after quotas cut supply of the harmful gases
It has said it will curb use of the pollutant, which has a global warming potential many times greater than carbon dioxide
It says this could help slow global warming by as much as 0.5°C