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… is estimated to contribute some 5 percent of global emissions of carbon dioxide, one of the main gases that … if it is to grow in a sustainable manner, by reducing emissions of the greenhouse gases that cause global warming … wildlife. It is also important to consider the ethics of trading mineral and fossil souvenirs (see Box 15). See …

… Cultural vandalism n Boats damaging banks n Habitat loss n Emissions and air pollution n Firewood collection n Visual … Air n Motorised transportation may cause pollution from emissions (from plane, train, ship or automobile). Wildlife n … collections, donations, sponsored sporting events, and trading in art (donated by artists and sculptors). The Trust …

… infrared emitters make use of digital modulated light (emissions which switch on and off at precise frequencies that … to the surface condition of the sensed object than optical emissions which tend to react differently to color and light …