TRANSPORTATION AND GLOBAL WARMING. Because of its near-total dependence on petroleum fuels, the U.S. transportation sector is responsible for about a third of our countryâs climate-changing emissions. Globally, about 15 percent of manmade carbon dioxide comes from cars, trucks, airplanes, ships and other vehicles. Reducing transportation emissions is one of the most vital steps in fighting global warming â and solutions to the transportation problem are already available.
spectro-. 1. a combining form representing spectrum, in compound words: spectrometer. British Dictionary definitions for spectro-. spectro-. combining form.
Any of various instruments used to analyze the component parts of a sample by separating its parts into a spectrum. In a light spectroscope, light is focused into a thin beam of parallel rays by a lens, and then passed through a prism or diffraction grating that separates the light into a frequency spectrum.