natural corrosion
61Ductile iron pipe — is a pipe commonly used for potable water distribution.[1] The predominant wall material is ductile iron, a spheroidized graphite cast iron, although an internal cement mortar lining usually serves to inhibit corrosion from the fluid being… …
62Hydrogen — This article is about the chemistry of hydrogen. For the physics of atomic hydrogen, see Hydrogen atom. For other meanings, see Hydrogen (disambiguation). ← hydrogen → helium …
63Environmental issues in the Niger Delta — Key environmental issues in the Niger Delta of Nigeria relate to its petroleum industry. The delta covers 20,000 km² within wetlands of 70,000 km² formed primarily by sediment deposition. Home to 20 million people and 40 different… …
64Liquefied petroleum gas — (also called LPG, GPL, LP Gas, or liquid propane gas) is a flammable mixture of hydrocarbon gases used as a fuel in heating appliances and vehicles. It is increasingly used as an aerosol propellant and a refrigerant, replacing chlorofluorocarbons …
65Methanol fuel — This article is about methanol used as a fuel. For other alcohols used as fuels, see Alcohol fuel. Methanol is an alternative fuel for internal combustion and other engines, either in combination with gasoline or directly ( neat ). It is used in… …
66Titanio — Escandio ← Titanio → Vanadio   …
67building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
68Tap water — Indoor Tap commonly found in the bathroom or kitchen. This tap is a single handle, double spout tap (one spout for hot water, one spout for cold water). Tap water (running water, city water, municipal water, etc.) is a principal component of… …
69Nuclear fuel — Process …
70Statue of Liberty — For other uses, see Statue of Liberty (disambiguation). Statue of Liberty Locat …
