Amazon will pay a $1.2 million penalty to settle nearly 4,000 alleged violations of U.S. law related to illegal pesticide sales.

The U.S. Environmental Protection Agency (EPA) alleges Amazon violated the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA), selling and distributing imported pesticide and insecticide products that weren’t approved in the U.S.

The online behemoth agreed to monitor and remove illegal pesticide products from its website to “significantly reduce the number of illegal pesticides available through the online marketplace,” the U.S. Environmental Protection Agency said. Amazon said third-party sellers had sold the products through its website, according to Reuters. The EPA contends the retailer was handling and profiting off the products.

Green industry professionals have expressed frustration with the regulatory burdens placed upon them in terms of certification and training, while observing that homeowners can purchase both restricted-use and nonregistered pesticides online, the National Association of Landscape Professionals said in its government affairs newsletter, The Advocate.