Dihydrogen monoxide is considered a greenhouse gas, which contributes to global warming. It is led to believe that dihydrogen monoxide could take part in the formation of cancer. Dihydrogen monoxide is sometimes fed to cows to increase milk production, the effects this could have on the cows, milk and humans drinking the milk hasn’t been sufficiently studied. Inhaling dihydrogen monoxide can easily kill. Extensive exposure to dihydrogen monoxide as a solid can cause tissue damage.

By the way don't drive monoxide is water.