WASHINGTON (AFP) -- A worried World Bank slashed its growth forecast for the global economy Tuesday, saying advanced economies are rebounding more slowly than expected and low commodity prices continue to hurt other countries.

The Bank said that the global economy should grow at just 2.4 percent this year, the same lethargic pace of 2015 and much slower than the 2.9 percent it predicted in January.

It said that the slow growth in advanced economies is holding back developed countries, with world trade and investment both depressed, and called for.

Prospects for a pickup “remain muted,” the Bank said, in a report especially downbeat for countries dependent on commodity exports like oil.

It said risks to growth have risen since the beginning of the year, particularly the high level of borrowing by companies in developing countries, which has left them vulnerable to credit crises as growth stagnates.

It also includes the rise in doubts that the aggressive monetary easing in developed countries, with negative interest rates in several, is doing the intended job of firing up economic activity.

“Economic growth remains the most important driver of poverty reduction, and that’s why we’re very concerned that growth is slowing sharply in commodity-exporting developing countries due to depressed commodity prices,” said World Bank Group President Jim Yong Kim.

“This sluggish growth underscores why it‘s critically important for countries to pursue policies that will boost economic growth and improve the lives of those living in extreme poverty.”

The report comes as the main developed country drivers of global growth -- Japan, Europe and the United States -- struggle for traction.

A sharp deceleration of the U.S. economy since the beginning of the year is not helping carry the rest of the world, and the World Bank has cut its expectations for the world’s largest economy by 0.8 percentage point to 1.9 percent in 2016.

The Euro area will achieve only 1.6 percent growth, and Japan, fighting off deflationary pressures, will manage just 0.5 percent.

In all three, the bank said, investment remains soft amid doubts about the efficacy of policies, particularly those of central banks holding interest rates at extraordinarily low levels.

China, the other major wheel of growth, will manage to hold onto a 6.7 percent pace, but the Bank sees it slowing further to 6.3 percent by 2018.

India too is holding onto a good pace, helped by the cheap prices of key commodities it imports, including oil.

But other large emerging economies like Brazil and Russia remain locked in recession, and Nigeria and South Africa are expanding very slowly.

“Conditions remain markedly challenging for commodity exporters,” the Bank said.