Kaiser Permanente, one of the country's largest healthcare providers, plans to announce Thursday that it is converting its intravenous equipment to more eco-friendly alternatives free of two chemicals that have been shown to harm humans and the environment, officials said. Kaiser will buy IV solution bags that are 100 percent free of PVC and DEHP and intravenous tubing that is free of DEHP. The two chemicals are widely used in medical products. DEHP, or di(2-ethylhexyl)phthalate, used to make plastic bags and tubing more pliable, has been linked to reproductive problems and other health effects. When PVC plastic is manufactured or incinerated, it creates dioxin pollution, a known carcinogen.