1.CFCs and substitutes and the ozone hole. The environmental effects of CFCs and their substitutes a.CFCs - highly stable molecules, lifetime in the atmosphere of between 50 and 100 years; contain 2 or 3 chlorine atoms. b.CFCs substitutes ( transitional compounds) i.HCFCs - one or more of the chlorine atoms has been replaced by hydrogen atoms, lifetime in the atmosphere about 20 years, have a tenth or twentieth of the potential damage of the CFCs. ii.HFCs - …
showed first 75 words of 4670 total

showed last 75 words of 4670 total
… was concluded that car sharing reduced the distances traveled by car. Overall, in developing politically, socially and economically viable approaches to hitting transport's sustainability goal, there is roughly a three-way split between: vThe role of increased fuel efficiency. vModal shift. vTrip length reduction. It was concluded that a third of the reduction could be achieved by technical measures and two-thirds by demand management. 29.Remember this - 1 KWh = 3.6 Mj