The Eiffel Tower turned green Sunday for the opening of the Paris climate conference, marking the launch of an art project that will see "virtual trees" grow on the landmark to support reforestation.
Thousands turned out for climate change marches across the Asia-Pacific region, part of a weekend of action across the globe to demand results from next week's historic Paris summit.
Prince Charles warned that if international leaders fail to clinch a deal on climate change at talks in Paris next week, it would leave mankind facing a "perfect storm".
The international community must secure a binding deal against climate change at key UN talks in Paris next week, German Chancellor Angela Merkel said.
Prime Minister Justin Trudeau will meet leaders of Canada's provinces and territories to hash out a cohesive climate strategy a week before key international talks in Paris.
French President Francois Hollande called for the creation of an "environmental security council" to verify and enforce measures to be adopted at a year-end UN climate summit.
Justin Trudeau takes over as Canada's prime minister, striking out on the diplomatic stage with a fortnight of back-to-back summits leading up to the UN climate talks in Paris.
French President Francois Hollande said Monday that Chinese support was "essential" to reaching an effective deal at the forthcoming climate change conference in Paris, as he began a visit to the Asian giant.
India's Prime Minister Narendra Modi called Thursday for a "comprehensive and concrete" agreement on climate change in December, as he addressed African leaders at a major summit in New Delhi.
French President Francois Hollande, on a visit to Iceland, said he was "very pessimistic" about the effects of climate change as negotiators prepare for preparatory talks in Bonn on a climate rescue pact.
Ministers and diplomats from 57 countries gathered in Paris to discuss the make-or-break issue of finance in a climate rescue deal to be sealed in the French capital in December.
Barack Obama arrives in Alaska for a trip aimed at highlighting the pace of climate change. But not everyone in this oil-rich state is welcoming the US president with open arms.
UN Secretary General Ban Ki-moon said that countries must "accelerate the rhythm of negotiations" on capping global warming ahead of an international climate conference in Paris in December.
Brazil and Germany threw their weight behind the push for a global climate agreement later this year and stressed the vital importance of defending the Amazon jungle from deforestation.