eBay Inc is facing legal challenges from the U.S. government over alleged breaches of environmental regulations. The charges are related to eBay's role in facilitating the sale of products that violate environmental norms, including over 343,000 'defeat' devices, more than 23,000 unauthorized pesticides, and over 5,600 paint and coating removers containing methylene chloride. eBay could face penalties that could escalate into billions of dollars.