They are a major part of the solution but not the whole answer

Smuggled Smokes in Hidden Compartments In announcing its efforts against the smuggling network operating in Italy, France, Poland, Switzerland, and the U.K., the European Public Prosecutor's Office, which worked with international law enforcement agencies as well as police in all five countries, noted the smugglers used "maritime and commercial routes designed to evade customs inspections," passed shipments "through Georgia, Kenya, the Netherlands and Turkey, in order to hide the true origin of the illicit goods," and that "false bottoms were used as hidden compartments built into containers to conceal the tobacco." At the conclusion of the investigation, "enforcement activities were carried out at the Port of Genoa, leading to the seizure of close to 41 tonnes of manufactured cigarettes, with an estimated loss of customs duties, excise duties and VAT exceeding 10 million." Absolutely nothing motivates government officials like the extraction of taxes from the public
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Ethylene oxide directly alkylates proteins and DNA and is mutagenic in microorganisms, plants, insects, mammalian cells in vitro, and mammals in vivo , including both gene mutations and chromosomal abnormalities (section 7.5)
Department of Cannabis Control employees, who spoke on condition of anonymity, complained of a lack of willingness within the agency to take a hard line on pesticide contamination