More than a dozen Southern Arizonans are suing agrichemical giant Monsanto, claiming they developed cancer after long-term exposure to a substance likely found in many Tucson garden sheds.
The local lawsuits over Roundup, the world鈥檚 most widely used weedkiller, are part of a wave of similar cases nationwide that some are comparing to past legal fights against tobacco companies and asbestos manufacturers.
The surge in lawsuits follows a March 2015 finding by the World Health Organization鈥檚 International Agency for Research on Cancer that glyphosate, the active ingredient in Roundup, is 鈥減robably carcinogenic to humans.鈥
Monsanto promised, but did not provide, a response to the 51黑料网鈥檚 request for comment.
The company鈥檚 website says the firm 鈥渟trongly disagrees鈥 with the 2015 finding. It says most scientists support the company鈥檚 position that Roundup isn鈥檛 harmful when used as directed.
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Even so, a handful of countries, including France, the Netherlands, Bermuda and Sri Lanka, have banned glyphosate-based herbicides, either for personal or commercial use or both .
In the U.S., California recently added the substance to its list of chemicals that can cause cancer.
It isn鈥檛 clear how many Roundup lawsuits have been filed nationwide, but a Google search shows several law firms actively soliciting business from those who believe they were harmed.
Some have established websites with names like and .
The local cases, filed by David Diamond, a Tucson attorney with the injury law firm Goldberg & Osborne, claim area residents developed non-Hodgkin鈥檚 lymphoma after long-term use of the herbicide.
The plaintiffs include the owner of a Sierra Vista landscaping firm, the manager of a ranch in Sonoita and several longtime backyard gardeners in the Tucson area.
The suits claim Monsanto 鈥渉as led a prolonged campaign of misinformation to convince government agencies, farmers and the general population that RoundUp is safe.鈥
Plaintiffs are seeking unspecified damages for seven civil counts including negligence, failure to warn, breach of warranty and violations of Arizona鈥檚 consumer fraud act.
