WASHINGTON (AP) -- The International Monetary Fund has slightly lowered its outlook for global economic growth this year and next, mostly because of weaker expansions in Japan, Latin America and Europe.

The IMF says the global economy will expand 3.3 percent this year, one-tenth of a point below what it forecast in July. World growth should pick up to 3.8 percent in 2015, the IMF says in the latest installment of its World Economic Outlook.

The global lending organization has a more optimistic view of the U.S. economy, which it expects will grow 2.2 percent this year, up from an earlier forecast of 1.7 percent.

Still, the IMF warned that growth in the U.S., Europe and Japan could be sluggish for years unless governments take steps to accelerate it.