List of topics that I like (but that may be difficult!):

• Waste-water problems as related to population increase, industrial activity and
  agricultural activity.
• Consumer spending as related to economic growth, stock market rise and fall and
  employment and unemployment rates.
• Drug innovations as related to government research spending, industrial research
  spending and industry's profits.
• Underage birth rates as related to education spending and other (?) social and
  economic factors.
• Weapons sales and economic indices as they pertain to different world powers.
• Car sales, new car models as related to the state of the economy, the unemployment
  rate and the rises and falls of the stock market.
• Overweight rate in the US as related to fast food industry expansion, state of the
  economy, education spending and political correctness movement spending.
• Study of spending on foreign policy. What influences it and what it influences.
• Any of the UMAP contest problems of the last few years gives a very interesting
  topic for a Project, but some of them are very very concrete.