5.32 The future role of the Airport and Airport-related development is a major issue. Specific issues include uncertainty about the pace and nature of its development, its potential to dominate and perhaps even over-heat the local economy and, from some quarters, there are environmental concerns. Current forecasts suggest that by 2015 the Airport will be catering for 40 million passengers per annum.
http://www.manchesterairport.co.uk/manweb.nsf/Content/Facts-OnePageAtAGlance
It only has 22million.