"As we look forward to the rest of the twenty first century, it is clear that satisfying the projected needs of an ever-larger world population with the economy we now have is simply not possible. The western economic model - the fossil-fuel-base, automobile-centered throwaway economy - that so dramatically raised living standards for part of humanity during this century is in trouble. Indeed the global economy cannot expand indefinitely." This quote is attributed to Lester R Brown, an eminent American environmental analyst and commentator. Is this view credible? Discuss.