The Environmental Protection Agency estimates that one in every 10 people in the United States is exposed to the toxic gas, which is also known as CO poisoning.
The average American is exposed once in every two years, according to the agency.
The EPA has said it is working on new measures to reduce the pollution that can result from coal-fired power plants, which are responsible for about half of CO pollution.
A report by the state’s auditor found that, for every $100 spent on carbon mono, the state had an additional $1.60 in lost wages and benefits, according for a study published in the American Journal of Preventive Medicine.
The report, titled The Carbon Monoxide Scare and How We Can Prevent It, found that state officials have not done enough to curb the rise in CO pollution, and that the EPA and other agencies are not properly tracking the number of people who are exposed to CO poisoning and how they are managing it.
The report also found that while states with more coal plants are expected to have lower CO levels than states without coal plants, the states with the most coal plants tend to have higher levels.