Activists run as they fight with police in Paris on Sunday during a protest ahead of the climate conference. (Christophe Ena/Associated Press)

From Melbourne to Mexico City, tens of thousands of people worldwide hit the streets this weekend for a global climate march, pressing world leaders to push for a bold international agreement at the upcoming climate summit in Paris.

The center for the demonstrations was supposed to be Paris, where nearly 150 world leaders are gathering for a U.N. global summit on climate change that kicks off Monday. But after the terrorist attacks there more than two weeks ago that killed at least 130 people, French police banned large protests.

On Sunday, they sought to enforce that ban, firing tear gas in the afternoon on an unauthorized gathering at the Place de la Republique, a focal point for protests, and detaining more than 100 people.

The square was also the site of an installation of “marching shoes,” made from donated shoes and meant to symbolize those banned from protesting. The Vatican sent shoes to represent Pope Francis, and U.N. Secretary General Ban Ki-moon donated a pair of his shoes.

Beyond the streets of Paris, more than 2,400 events around the world took place this weekend, with demonstrators hoping to encourage world leaders to deliver a loud message to their negotiators: Do not leave Paris without a strong agreement to slash carbon emissions. The summit concludes Dec. 11.

Dozens of people were arrested Sunday in demonstrations that turned violent in Paris. The demonstrations were timed with a major U.N. climate change conference in the city and were centered in an area of memorials related to the recent Paris attacks. (Zoeann Murphy/The Washington Post)

In the District, several hundred gathered by the White House and marched along the Mall, with signs that read, “Preserve our home,” “Don’t nuke the climate” and “Keep it in the ground,” the latter referring to fossil fuels.

“If you know there’s other protests going on around the world at the same times as yours, it just gives you a lot of energy,” said Ted Conwell, a founder and organizer of Climate First, a clean-energy advocacy group based in Takoma Park, Md. “We are the people. We are the boss. We can tell our government we don’t want our climate destroyed any further.”

Vinicius Gonzalez, 21, of Sao Paulo, Brazil, said that while the D.C. demonstration appeared smaller than some of the others — chilly temperatures and overcast skies may have been a factor — the combined effect of the worldwide protests would be vast.

“As individuals, we can’t do much, but if many people show they care about climate change, then they have the power to make the leaders act,” he said.

The sheer number of demonstrations around the globe shows that there is widespread public support for action, said Sam Barratt, a spokesman for Avaaz, a global activist community that has helped coordinate many of the marches.

“It shows it isn’t just a green issue — it’s an everyone issue,” he said.

In Nepal, people marched alongside traffic in the streets of Kathmandu, holding signs that read, “Climate terrorism ends here” and “Save our Himalayas.” Organizers in New Zealand said they saw the largest climate marches to date, with about 15,000 hitting the streets in Auckland for a rally that ended with people slapping their thighs and sticking out their tongues for what they called the “People’s Climate Haka.” Undeterred by rainy weather, people in Beirut urged their government to take strong action while marching with a wide array of colorful umbrellas.

Protesters are calling for countries to do more to curb greenhouse-gas emissions and for wealthier nations to help fund vulnerable and poor nations in the transition to cleaner energy.

It was a message broadcast loudly by tens of thousands marching in central London, where many spoke of their disappointment with the British government for dramatically cutting support for solar and onshore wind energy in recent months.

There was a carnival atmosphere on the wet and windy streets of the British capital, with floats and vibrant costumes and actress Emma Thompson lending star power. The thumping music came compliments of Radiohead’s Thom Yorke, who was DJing.

Sommer Birch-Skerradd, 19, a student wearing a fluffy polar bear costume, said, “We do need to keep up the global voice, to give those final pushes to make a big difference.”

The climate demonstrations in the United Kingdom included many people who had planned to march in Paris over the weekend.

The global interest in influencing the Paris talks “shows that there’s been a significant effort to raise awareness,” said Bob Ward, policy director for the London-based Grantham Research Institute on Climate Change and the Environment.

But other causes have brought far more people to the streets than this, and he argued that the scale of the demonstrations were not proportional to the scale of the problem.

“If it was a massive meteorite hurtling towards Earth, one could imagine an urgent and radical response, nothing but coverage. Because we are dealing with something that people find difficult to grasp, partly because of uncertainties and because risks are in the future and the impacts are distributed, I think people are not really as aware of what’s at stake here,” he said.

Some people said they were aware of the stakes and were even willing to venture out on unsafe streets to make their voices heard.

Walid al-Hashef, 29, organized a march through the ancient city of Sanaa, the capital of Yemen, which has endured eight months of bombings. The march drew about 70 people, he said, and began with the singing of Yemen’s national anthem followed by reading passages in the Koran that related to climate change. Partway through the march, he said, he had to change routes after a nearby airstrike.

Yemen suffers from frequent water shortages, and Hashef said he hoped the climate demonstrations would encourage world leaders to take action.

“We want a better future for our children,” he said.

Siddiqui reported from Washington. Griff Witte in Paris contributed to this report.

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