Delegates from nearly 200 nations have begun the latest UN climate talks in Poland. It's been three years since the landmark Paris deal was reached to cut carbon emissions. Scientists warn the world is still on track for a dangerous rise in global temperatures. Poland itself remains dependent on coal, which is used to generate 80-percent of its power. Meanwhile, thousands rally in Belgium for more action on climate change. CGTN's Mariam Zaidi reports from the crowds in Brussels.

A carnival atmosphere in downtown Brussels. But the beating of the drum was a call to arms for the biggest cause of all saving the planet. 

MARIAM ZAIDI BRUSSELS "As the UN Climate Conference kicks off in Poland today to highlight and promote ways to combat climate change. We're here in the north of Brussels city centre where people have gathered to - in their words to "claim the climate." They want this to be the biggest mobilisation of people to get their voice heard on climate change."

Some took aim at Belgian Prime Minister Charles Michel. But would world leaders hear them?

LAURA DEMONSTRATOR "Well, I hope they will because they're supposed to represent the people of the whole world since it's global. So I wish they will."

Carrying banners and props, in costume and in song, police put the figures of those taking part in the demo at 65,000. And this group of children had their own ideas on the future. 

"We may be the last to live on this Earth because it's too hot. Maybe the people who will live after us will change and have only three fingers."

"And animals disappear little by little because we are selfish and we do not think of them."

"If the bees disappear, we disappear too."

Protesters rallied to support the 2015 Paris Climate Change Agreement. But the European Commission wants to go further than capping emissions to below 2 degrees centigrade. It wants Europe to be climate neutral by 2050.

All public transportation was free, encouraging people not to drive.  

As the demonstrators reached the EU heartland, the songs and the sheer noise had grown even louder. Now their focus turns to Poland and the climate conference. Will leaders do more to save the planet? Mariam Zaidi, CGTN, Brussels.