Did you know that Dihydrogen Monoxide is such a dangerous substance?

The dangers of dihydrogen monoxide include:

• Also called "hydroxyl acid", the substance is the major component of acid rain;
• Contributes to the greenhouse effect;
• Contributes to the erosion of our natural landscape;
• Accelerates corrosion and breakdown of electrical equipment;
• Excessive ingestion may cause various unpleasant effects, including death;
• Prolonged contact with its solid form results in severe tissue damage;
• Inhalation, even in small quantities, may cause death;
• Its gaseous form may cause severe burns;
• It has been found in the tumors of terminal cancer patients;
• Withdrawal by those addicted to the substance causes certain death within 168 hours;

Despite the danger, DHMO is often used:

• Used in many forms of cruel animal research;
• The US Navy has a secret distribution network for DHMO;
• Lakes and rivers all over the world are contaminated with DHMO;
• In the distribution of pesticides. Even after washing, produce remains contaminated by this chemical;
• As an additive in certain "junk-foods" and other food products;
• Known to be a component of a number of cancer-causing agents

Nevertheless, governments and corporations continue using it widely, heedless of its grave dangers.

Source: http://en.wikipedia.org/wiki/Dihydrogen_monoxide 

Ok sorry, I lied. It's just the scientific name for water, h2o.

Dihydrogen monoxide (DHMO) is a scientific name for water that is relatively unknown to most of the public, used in hoaxes that illustrate how the lack of scientific knowledge and an exaggerated analysis can lead to misplaced fears. "Di" meaning two, and "Mono" meaning single, describes how water is made up of two hydrogen atoms and one oxygen atom (H₂O).

So, walk into a restaurant and ask for a glass of ice cold dihydrogen monoxide tomorrow.