 Mining companies participate in the CC–PP Game by depleting their worker's health.Hardin argues that the owners of mining companies profit from their workers, while workers suffer the negative health effects of mining such as respiratory damage, chronic lead poisoning, mercury poisoning, black lung disease, and poisoning by radon gas in uranium mines.Hardin states, "Until the development of nationalized schemes of compensation in the twentieth century the costs of deteriorated health were "paid" by the miner himself, partly in medical bills but even more in reduced capacity to work and enjoy life."