Fortunately, acceptable formaldehyde emission levels from wood panel products are continuously dropping. Some reasons for these levels to be lowered are public awareness, which creates a greater demand for non-hazardous products, as well as things such as government regulations. The International Agency for Research on Cancer, and the National Toxicology Program now recognize formaldehyde as a carcinogen. This has made the public more concerned on the topic, and has also gotten reactions by worker and consumer associations, environmental organizations, authorities, and the industry itself. Generally, all flooring manufactured in North America abides by the American National Standard for Particleboard (ANSI A208.1). This is the voluntary standard. In North America, the allowed formaldehyde emission levels are 0.20 ppm for particleboard. Flooring that is manufactured in Europe abides by the European E1 standard, which is 0.14 ppm. Flooring that is manufactured in Asia and imported to North America abide by the European E2 standard, which is 0.32 ppm. On April 26, 2007, the California Air Resources Board (CARB) approved an airborne toxic control measure. This control measure reduced acceptable formaldehyde emissions from hardwood plywood (HWPW), particleboard (PB), and medium density fiberboard (MDF). The CARB standard is for indoor products in the state of California, but will be the standard for the rest of North America, and is recognized around the world. The CARB rule was put into place in two phases. CARB I was implemented January 1, 2009. These standards for the allowed formaldehyde emissions were 0.08 ppm for HWPW, 0.18 ppm for PB, and 0.21 ppm for MDF. Two years after CARB I was introduced, CARB II was set and allowed emission levels were lowered. The new standards were set at 0.05 ppm for HWPW, 0.09 ppm for PB, and 0.11 ppm for MDF. CARB II is the law for formaldehyde emissions in California, but has yet to be implemented across the rest of the United States. The rest of the country is expected to abide by the CARB II standards in 2015.