From the BBC, are some quotes from the Zoellick's speech.
"There is a widespread recognition that the world faces an unprecedented economic crisis, poor people could suffer the most and that we must continue to act in real time to prevent a human catastrophe," said Mr Zoellick.
He added that no-one yet knew how long the global recession would last.
In a joint statement, the World Bank and International Monetary Fund (IMF) said they had urged "all donors to accelerate delivery of commitments to increase aid, and for us all to consider going beyond existing commitments".
World Bank managing director, and former Nigerian Finance Minister, Ngozi Okonjo-Iweala, said there was now a real crisis in Africa as a result of the worldwide recession.
She said that as a result of falling demand for commodities and other exports, government budgets were falling short across the continent.
"This means that [governments] cannot pay teachers or health workers, and we are hearing of people who can't eat three square meals a day," she said.