Acids, particularly those with a high concentration of H+ ions, can be extremely hazardous. H+ ions are extremely hazardous. Never consume acids since they can corrode (and so kill) your organs. This would certainly result in organ damage and, in the worst-case scenario, death. It is important to understand that acids can be very dangerous chemicals. They can burn skin, eat through metal, dissolve rocks, and destroy living tissue. Acids have the ability to change the color of metals and plastic, causing them to fade or corrode away. Acid rain is caused by the interaction of nitrogen and phosphorus oxides with water molecules during precipitation process. These reactions produce a number of different compounds, some of which are acids. Some common acids include acetic acid, formic acid, and hydrochloric acid. Acids also play an important role in chemistry laboratories when working with toxic substances. Laboratory acids are usually dilute solutions of strong acids diluted with water. They are used to react with other chemicals to create new products that may not otherwise exist. Some examples of acids that are commonly found in the environment are vinegar, citrus fruit juice, wine, tomato sauce, battery acid, and urine. Vinegar is made from fermented grape juice and contains a large amount of alcohol as well as various other chemicals including acetate, hydrogen chloride, and sulfur dioxide.