Solving the BIG problems of the world

Given $50 billion to spend, which would you solve first, AIDS or global warming? Danish political scientist Bjorn Lomborg put this question to economists and students around the world, and the answers they came up with may surprise you. Ranking our toughest problems not on any moral scale but simply by how effectively they can be solved, Lomborg and his colleagues demand we take a fresh look at doing good.

Grab and pen and paper and see how YOU do!