^In a nutshell, countries have been de-valuing, so to speak, their currency in the hope that the value of their exports will go up since all the money they spent trying to fix the economy didn't fix the economy. This has all but started a currency war, mainly between the United States and China.
The main topic at this weekends G20 meeting needs to be about how to avert this currency war or were all going to be in big trouble.