G20 leaders met in Rio de Janeiro on Monday for talks on climate change, ongoing wars in Ukraine, Gaza and Lebanon, and more, at a forum that highlighted differences between world powers but also delivered some successes.

Here are five key takeaways from the summit:

- No climate breakthrough -

Hopes were high that G20 leaders would jumpstart stalled UN climate talks taking place in Azerbaijan.

In their final declaration, however, they merely recognized the need for "substantially scaling up climate finance from billions to trillions from all sources."

A decade after Islamic State group extremists rampaged through northern Iraq, Moaz Fadhil and his eight children finally returned to their village after languishing for years in a displacement camp.

Their home, Hassan Shami, is just a stone's throw from the tent city where they had been living, and it still bears the scars of the fight against IS.

The jihadists seized a third of Iraq, ruling their self-declared "caliphate" with an iron fist, before an international coalition wrestled control from them in 2017.

On a mountain slope in south Lebanon, agricultural worker Assaad al-Taqi is busy picking olives, undeterred by the roar of Israeli warplanes overhead.

This year, he is collecting the harvest against the backdrop of the raging Israel-Hezbollah war.

He works in the village of Kfeir, just a few kilometres (miles) from where Israeli bombardment has devastated much of south Lebanon since Israel escalated its campaign against Iran-backed Hezbollah in September.

Abdelrahman Abu Anza's family home in war-ravaged Gaza's south has been reduced to rubble, which the Palestinian man is now using to build a shelter to protect from the winter cold.

Israeli bombardment in more than 13 months of war has left "more than 70 percent of civilian housing... either damaged or destroyed", according to the United Nations' humanitarian agency OCHA.

With many residents of the Gaza Strip displaced by the war, often seeking shelter in tent camps, the approaching winter is a major cause for concern.

Lebanon's health ministry said that an Israeli strike Monday -- the third in two days in central Beirut -- killed at least five people in a densely packed neighbourhood.

"The Israeli enemy strike on Zuqaq al-Blat in Beirut... killed five people" and injured 31 others, a ministry statement said, giving an updated toll.

The death toll is likely to rise because two people were missing and some remains recovered from the site were "being verified", the statement said.

Efforts to reach dozens of people trapped under the rubble of a multi-storey residential building in devastated north Gaza carried on Monday, the civil defence agency said, despite persistent fighting.

Rescuers on Sunday said they had pulled at least 34 bodies -- including women and children -- from rubble of the building in the Beit Lahia district after a particularly lethal pre-dawn strike in the area where Israeli forces began a major operation on October 6.

The United Nations and others have decried humanitarian conditions in the area.

Canadian authorities recently foiled an alleged Iranian plot to assassinate Irwin Cotler, a former justice minister who has been a strong critic of Tehran, Cotler's organization said Monday.

The 84-year-old was justice minister and attorney general from 2003 to 2006. He retired from politics in 2015 but has remained active with many associations that campaign for human rights around the world.

The Globe and Mail newspaper reported that he was informed on October 26 that he faced an imminent threat -- within 48 hours -- of assassination from Iranian agents.

The European Union's outgoing top diplomat Josep Borrell said Monday he had "no more words" to describe the situation in the Middle East, before chairing his last planned meeting of the bloc's foreign ministers.

"I exhausted the words to explain what's happening in the Middle East," Borrell told reporters, barely concealing his frustration at the EU's failure to weigh on the Israeli-Palestinian conflict during his five-year mandate.

Israel staged a new bombing raid on central Beirut Monday, killing five people according to the health ministry, as firefighters said a rocket launched from Lebanon killed one woman in Israel.

The Hamas-run interior ministry in Gaza said at least 20 people were killed there in an operation against the looting of aid trucks in the stricken territory.

Israel has staged multiple strikes against central Beirut in recent days, after weeks of air raids aimed at emptying the southern suburbs stronghold of the Iran-backed Hezbollah group.

Beneath the blazing Egyptian sun, crowds at the Giza Pyramids gazed up at the ancient wonders, but some had their eyes peeled for a new attraction.

"There he is," one Polish tourist told his wife as they spotted a scrappy dog perched on one of the stones.

They were talking about Apollo, a stray who became an overnight sensation last month after being filmed scaling the Great Pyramid of Khafre, one of the seven wonders of the world.