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Ecology & Environment
Mahesh

09/03/24 08:52 AM IST

Smuggling greenhouse gases

In News
  • A California man is facing criminal charges in a San Diego court for smuggling, not illegal drugs or weapons, but greenhouse gases (GHGs).
Criminal charge
  • Fifty-eight-year-old Michael Hart, who appeared in court on March 4, allegedly bought canisters of two types of banned refrigerants or coolants used in obsolete airconditioners and refrigerators in Mexico, and brought them to the US in his car, concealed under tarpaulin sheets and tools. He then sold the refrigerants online at marketplaces such as OfferUp and Facebook Marketplace.
  • According to his indictment, Hart smuggled or illegally sold dozens of canisters of the refrigerants in mid-to-late 2022, and claimed that he could import 15-20 “tanks” a week.
Banned refrigerants
  • The refrigerants in question are hydrofluorocarbons (HFCs) and a form of hydrochlorofluorocarbons (HCFCs), known as HCFC 22.
  • HFCs and HCFCs became mainstream after emerging as an alternative to chlorofluorocarbons (CFCs) in the 1990s.
  • For long, CFCs were the go-to refrigerants for ACs and fridges.
  • Research published in 1985, however, confirmed that increased levels of CFCs in the atmosphere were responsible for abnormally low ozone concentrations above Antarctica, resulting in the so-called ozone hole.
  • Refrigerants are released into the atmosphere by damaged appliances or car ACs. Ninety per cent of refrigerant emissions are estimated to occur when equipment reach their end of life and are improperly disposed of.
Measures to address these refrigerants
  • In 1987, almost 200 countries signed the Montreal Protocol, agreeing to freeze the production and consumption of ozone-depleting substances, including CFCs, at then current rates.
  • Under the Montreal Protocol, countries were to phase out CFCs by 1996, and HCFCs by 2030. HCFCs were used only as an “interim” solution to CFCs because they were less harmful to the ozone layer.
  • As a result, HFCs which, unlike CFCs and HCFCs, have zero ozone-depleting potential (ODP), gradually became the most prominent refrigerant. But scientists soon realised that like CFCs and HCFCs, HFCs too are powerful greenhouse gases.
  • Even in relatively small amounts they (HFCs) contribute significantly to near-term warming as greenhouse gases which are hundreds to thousands of times more potent than carbon dioxide (CO2) per unit of mass.
  • In 2016, more than 150 countries signed the Kigali Amendment to the Montreal Protocol, agreeing to reduce consumption of HFCs by 80% by 2047. If successful, the amendment could avoid more than 0.4 degree Celsius of global warming by 2100.
US law about HCFC
  • The Montreal Protocol was implemented in the US in 1990 by an addition to the Clean Air Act, a federal law that regulates air emissions from stationary and mobile sources.
  • That addition identified HCFC 22 (which Hart smuggled into the US) as a regulated ozone depleting substance.
  • Since 2020, the US has banned the import of HCFC 22 for any purpose other than in a process which results in its transformation or destruction.
  • The American Innovation and Manufacturing (AIM) Act, passed by Congress in December 2020, authorised the US Environmental Protection Agency (EPA) to phase down production and consumption of numerous forms of HFCs.
  • Starting January 1, 2022, regulated HFCs cannot be imported into the US in bulk without the EPA’s permission. “No person may sell or distribute, or offer for sale or distribution, any regulated HFC that was imported illegally,”
Source- Indian Express

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