(ANSA-AFP) - UNITED NATIONS, SEP 20 - Ukrainian President Volodymyr Zelensky in a wartime trip to the United Nations on Tuesday urged the world to stand firm against Russia's "genocide," as he tried to convince skeptical developing nations they share a stake in Kyiv's victory. Taking the rostrum of the UN General Assembly in his trademark military fatigues, Zelensky renewed an invitation for world leaders to join a "peace summit" to end the invasion. "For the first time in modern history, we have the chance to end the aggression on the terms of the nation which was attacked," Zelensky said in a speech met with applause led by Western nations but many empty seats elsewhere. "This is a real chance for every nation -- to ensure that aggression against your state, if it happens, God forbid, will end not because your land will be divided," he said, but with sovereignty upheld. Zelensky lashed out at Russia for what Ukraine says is the deportation of thousands of children. The practice has led the International Criminal Court to issue a warrant for the arrest of President Vladimir Putin of Russia, which says it is taking war orphans into foster care. "Those children in Russia are taught to hate Ukraine, and all ties with their families are broken," Zelensky said, as Russia's deputy ambassador to the United Nations sat without expression. "This is clearly a genocide. When hatred is weaponized against one nation, it never stops there," he said. He accused Russia of using both energy and food as a way to pressure the world, after Moscow ended a UN-backed agreement to let ships of grain sail out of Ukraine. "The aggressor is weaponizing many other things, and those things are used not only against our country but against all of yours as well." (ANSA-AFP).