The World Social Forum wrapped up a five-day meeting in this southern Brazilian city, urging citizens to "take to the streets on June 5" for the global action, which would be in support of social and environmental justice.

The forum also announced a "peoples' summit" of social movements to be held in parallel with the high-level UN conference on sustainable development scheduled next June 20-22 in Rio.

The Rio+20 summit, the fourth major gathering on sustainable development since 1972, will press world leaders to commit themselves to creating a social and "green economy," with priority being given to eradicating hunger.

But World Social Forum participants, including representatives of the Arab Spring, Spain's "Indignant" movement, Occupy Wall Street, and students from Chile, sharply criticized the concept of "a green economy" that would allow multinational corporations to reap the profit.