1) Malaysia
2) Pakistan
3) China
4) India
Explanation:
China has been using CFC-11 or Trichlorofluoromethane, a banned Ozone-Depleting chemical. This was published in the journal Nature. It is against the 1987 Montreal Protocol.As per the study released in May 2018, emissions of CFC-11 were on the rise since 2013. It witnessed 25% since 2012.Between 2008 and 2012, eastern China emitted an average of about 6,400 metric tonnes of CFC-11 per annum and it was increased to 13,400 metric tonnes per annum from 2014 to 2017.China is the world’s largest polyurethane foam market. According to UK-based Environmental Investigation Agency (EIA), the Chinese foam manufacturers have been using CFC-11 illegally to save on the higher cost of alternatives such as hydrochloro-fluorocarbons like HCFC-141b and factories in Shandong province were still making and using gas to manufacture foam insulation.