World leaders are also set to address environmental issues at the UN this week... and ahead of it, people from around the globe poured into streets to call for action.
40-thousand marchers are said to have showed up in London... demanding governments to cut carbon emissions and stop climate change.
Organizers in Australia said as many as 20-thousand had participated in rallies in Melbourne, as the country faces severe droughts, brushfires and storms.
In Manhattan, more than 100-thousand people took part in the so-called "People′s Climate March" that also brought out UN Secretary-General Ban Ki-moon, actor Mark Ruffalo and former U.S. Vice President Al Gore.
The UN summit on Tuesday is due to bring together 1-hundred-25 heads of state... with the hope of reaching a universal agreement by the end of 2015.

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