ついでなので英文も。自信ないですが。
DHMO is used as a conductor of nuclear power in most nuclear plants. DHMO keeps being used though they do not need HDMO as a conductor necessarily. The reason is that "DHMO is cheap."
If the employee inhales DHMO of the liquid into the bronchial tube, grave breathing difficulties are caused. The electric power companies and our government know that. The reason why it doesn't make news is only "Not happened yet."
In Japan, the power plant using less DHMO was built before. However, the plant was not used as for "Various reasons".
Certainly, DHMO is a steady chemical. It is easy to treat more than alternative chemicals. However, the steadiness means DHMO is not destroyed naturally. DHMO might keep existing in the natural environment at long time, several billion years. Meanwhile, DHMO keep influencing human being.
Should we human races keep using DHMO? The answer is clear.