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.
specÂ·troÂ·scope. Any of various instruments used to measure the wavelengths and intensity of radiation by splitting the radiation up into a spectrum. In a light spectroscope, light enters a narrow slit, is focused into a thin beam of parallel rays by a lens, and passes through a prism that separates it into a spectrum.