
Logo of the National Institute of Standards and Technology |

NIST administration building in Gaithersburg
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Liquid flow across the tubes of a heat exchanger in a nuclear power plant |

Calculated sulfuric acid dew points of typical combustion flue gases, as a function of SO3 content, and water vapor content
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Landscape with Clear Air and Clouds |

Glowing embers of barbecue solid fuel
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Diagram of a de Laval nozzle showing how temperature, pressure and the velocity of gas flowing through the nozzle will vary from inlet to outlet |

Diagram of a de Laval nozzle showing how the flow velocity increases from slow (green) to fast (red)
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A classical venturi tube |

Frictional and other forces acting on a body at rest
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Diagram of the catalysis cycle |

The effect of a catalyst on a chemical reaction
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Energy level diagrams for exothermic and endothermic reactions |

Sequence of steps in typical chemical engineering process design
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Schematic flow diagram of a typical Glycol Dehydration process unit |

Diagram of the four majors phases of matter
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Hydroelectric power plant at Three Gorges Dam on Yangtze river in China |

Wind farm turbines in San Gorgonio Pass, Southern California
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Wind farm turbines near Fluvanna, Texas |

Wind farm turbines in San Gorgonia Pass, Southern California
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Windmill in Budel, North Brobant, The Netherlands (circa perhaps 12th century) |

World's tallest Darrieus wind turbine, Gaspé peninsula, Quebec, Canada
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U.S. copy of International Prototype Kilogram |

The BIPM building in Sèvres, France
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The International Prototype Kilogram (IPK) maintained by the BIPM at Sèvres, France |

MIT Professor Edwin Richard Gilliland (1909-1973)
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Jeremias Benjamin Richter |

Methane cracking reaction
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Ammonia synthesis reaction |

HAZOP methodology steps
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Fire at Delek Refinery in November 2008, Tyler, Texas |

Smog over New York
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Smog over Sao Paulo, Brazil |

Smog over London
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Smog over Beijing |

Smog over Kuala Lumpur, Malysia
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Smog over Milan"' |

Smog over Mexico City"'
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Smog over Moscow"" |

Smog over Denver
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Smog formation chemistry |

Air dispersion basin with submerged aeration basin
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Diagram of two different types of Air Strippers |

'Schematic diagram of air stripping system with optional heating of feed liquid
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Depiction of the Helium atom's structure. |

A common conception of the structure of an atom
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Modern conception of the quantum atom' |

Depiction of how acid rain is formed'
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Map of acid rain pH across the United States |

A political cartoon denouncing the Ku Klux Klan and White League opposition to Reconstruction
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1866 Pennsylvania election poster showing Bureau money lavished on lazy freedmen at the expense of white workers.
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Simon Legree and Uncle Tom: A scene from Uncle Tom's Cabin, the famous 1851 abolitionist novel
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Distribution of slaves in the United States in 1820 |

Room of African American women sewing in Freedmen's Union Industrial School, Richmond, Virginia, 1866.
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1868 Republican cartoon identifies Democratic candidate Horatio Seymour (right panel) with KKK violence and with Confederate soldiers (left panel). |

Maps showing decrease in wet sulfate deposition
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The pH tolerance of various aquatic species |

Red Spruce trees destroyed by acid rain and calcium depletion
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Trees destroyed by acid rain |

BASF chemical company headquarters in Ludwigshafen, Germany
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Large-scale, industrial piping |
Chemical plant in the harbor area of Rotterdam, Netherlands.
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Umweltbundesamt organization chart |

Interior of UBA headquarters building in Dessau, Germany
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Logo of the Umweltbundesamt (Federal Environment Agency of Germany)
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