According to World Bank's president.

The main challenge for the world economy in 2010 will be to return the stable growth, said World Bank President Robert Zoellick.
This year will be difficult for the world economy, while 2010, regardless of stimulation measures, will remain very uncertain, said Zoellick.
World Bank at the same time expects slow recovery of the global economy.
There are also signs of recovery in Southeast Asia, Latin America, the Middle East and even Africa.
It can also be locomotive for world economic growth, "said Zoellick.