G20 summit kicks off in Brazil

Brazil's President Luiz Inacio Lula da Silva opened the summit of the Group of 20 major economies on Monday with the launch of a global alliance to combat poverty and hunger that more than 80 countries have agreed to back.

As G20 leaders met at Rio de Janeiro's Modern Art Museum for two days of talks, their agenda highlighted a shifting global order as US president-elect Donald Trump returns to power. Their discussions of trade, climate change and international security will run up against the sharp US policy changes that Trump vows upon taking office in January, from tariffs to the promise of a negotiated solution to the war in Ukraine.

In his opening remarks, Lula said the devastating effects of a changing climate can be seen around the world, calling for action by leaders on hand to address global warming and poverty. The alliance he launched, coordinating global efforts to eradicate hunger and poverty, is backed by the African Union and European Union, international organizations, development banks and philanthropies such as the Rockefeller Foundation and the Bill & Melinda Gates Foundation.

"Hunger and poverty are not the result of scarcity or natural phenomena ... they are the product of political decisions," said Lula, who was born in poverty and entered politics organizing a metalworkers union.

"In a world that produces almost 6 billion tons of food per year, this is unacceptable," he said.

Diplomats drafting a joint statement for the summit's leaders have struggled to hold together a fragile agreement on how to address the escalating Ukraine war, even a vague call for peace without criticism of any participants, sources said.

A massive Russian air strike on Ukraine on Sunday shook what little consensus they had established, with European diplomats pushing to revisit previously agreed language on global conflicts.

The United States has also lifted prior limits on Ukraine's use of U.S.-made weapons to strike deep into Russia. Russian President Vladimir Putin did not attend the summit, and Moscow was represented by Foreign Minister Sergey Lavrov.

Security in Rio de Janeiro has been strengthened with troops reinforcing police for the duration of the summit. A Brazilian army patrol came under gunfire near a Rio de Janeiro slum in the hours before the summit began, police said.

No one was injured in the incident by the hillside Cidade de Deus community some 20 km (12 miles) west of the G20 venue