GLENEAGLES, Scotland - World leaders wrapping up an economic summit shaken by terrorism agreed today on an "alternative to the hatred" - aid packages for the Palestinian Authority and Africa and a mere pledge to address global climate change.

"We speak today in the shadow of terrorism, but it will not obscure what we came here to achieve," British Prime Minister Tony Blair, the summit host, said to close the three-day gathering.

"It isn't all that everyone wanted but it is progress - real, achievable progress."

With a last-minute pledge from Japan, Blair won a key victory, announcing that aid to Africa would rise from the current $25 billion to $50 billion.

Blair ticked off a list of accomplishments from a meeting that nonetheless produced less than he had hoped going in.

Aside from the massive increase in aid for the African continent, leaders signaled support for new deals on trade, canceled the debt of some of the world's poorest nations, pledged universal access to AIDS treatment, committed to a peacekeeping force in Africa and heard African leaders promise to move toward democracies that follow the rule of law, he said.

"All of this does not change the world tomorrow - it is a beginning, not an end," Blair said, with President Bush and the other G-8 leaders and the leaders of five African nations standing behind him. "And none of it today will match the same ghastly impact as the cruelty of terror. But it has a pride and a hope and humanity at its heart that can lift the shadow of terrorism and light the way to a better future."

Nigerian President Olusegun Obasanjo thanked the leaders for focusing on Africa and for "their resolve not to be diverted by these terrorist acts."

Blair said the Palestinian aid package would total $3 billion "in the years to come." The British leader said the assistance was designed "so that two states, Israel and Palestine, two peoples and two religions can live side by side in peace."

The leaders failed to overcome stiff resistance from the Bush administration to launching a more aggressive attack on global warming.

Describing the agreement on climate change, Blair said merely that the plan of action "will initiate a new dialogue" between the summit countries and leaders from developing economies who also met with them.

The leaders, struggling to keep to their mission in the aftermath of deadly bombings that rocked London's rush hour on Thursday, shortened the final day of their summit to allow Blair to rush back to lead a government panel dealing with the blasts.

On Thursday, Blair had left the summit for several hours to confer with officials at Scotland Yard and calm a nation shocked by the worst attacks on the capital since World War II. Though he later returned, business did not proceed as planned.