Why did several nations walk out of trade talks in Cancun Mexico 2003?

Several nations

including India, Brazil, China and South Africa staged a dramatic walkout after negotiations broke down with richer nations refusing to make concessions on key agricultural and intellectual property rights issues.

They called for an end to trade policies which hurt poorer nations and developing counties. India in particular objected to demands, from the U.S and EU, to cut its agricultural tariffs further . India argued it needed to support a large rural population depending on farming

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