MADRID -- Climate activist Greta Thunberg said Friday calls for real action against climate change are still being "ignored" by political leaders despite their continuous praise of the global environmental youth movement she helped create.
The Swedish teen was in Madrid, where United Nations-sponsored talks on climate change are underway, to join fellow young climate activists, representatives of Latin America's indigenous peoples, and thousands of other protesters.
Before marching, Thunberg said at a press conference she hoped the COP25 summit would lead to "something concrete" and "increasing awareness among people in general."
"We have been striking now for over a year, and still basically nothing has happened," she told reporters, surrounded by three activists from Spain and Uganda. "The climate crisis is still being ignored by those in power."
The 16-year-old was followed by a swarm of cameras and reporters from the very first step she took out of an overnight train from Lisbon.
The advocate of carbon-free transportation arrived in the Portuguese capital earlier this week after sailing across the Atlantic Ocean from the United States by catamaran.
During the Dec. 2-13 talks, nearly 200 countries are meant to streamline the rules on global carbon markets and agree on how poor countries should be compensated for destruction largely caused by emissions from rich nations.
An official directly involved in the negotiations said that despite a few setbacks, the technical negotiations were progressing, although many issues were being left for ministerial-level meetings in the summit's second and final week.
The official, who asked to remain anonymous given the sensitivity of the discussions, added a political declaration on greater "ambition" was shaping to be "difficult to achieve."
"A summit that doesn't end with enhanced ambition would be something that nobody would understand if we take into account what the streets and science are telling us," the official said.
The talks came as evidence mounts about disasters that could ensue from further global warming, including a study commissioned by 14 seafaring nations and published Friday predicting that unchecked climate change could devastate fishery industries and coral reef tourism.
The study commissioned by seafaring nations says climate change could cause hundreds of billions of dollars in losses by 2050, adding that limiting global warming would lessen the economic impact for coastal countries, but that they also need to adapt to ocean changes.
Demands for greater action by non-governmental organizations and a whole new generation of environment-minded activists were expected to take the spotlight with the presence of Thunberg in Madrid.
Past appearances have won her plaudits from some leaders -- and criticism from others who've taken offense at the angry tone of her speeches.
Asked about the skepticism on global efforts to fight the warming temperatures expressed by some world leaders, including U.S. President Donald Trump and Brazil's Jair Bolsonaro, she said: "Some people want everything to continue like now, they are afraid of the change that we, the youth, are bringing."
"They try so desperately to silence us," she added.
Next to her, Vanessa Nakate, a 22-year-old member of Uganda's chapter of Fridays for Future said that young activists don't want more promises.
"We are tired of the praises that you keep giving the activists," she said. "We want you to act."
During an earlier surprise visit to the venue of the talks, Thunberg joined a group of some 40 teens staging a sit-in there to demand real action against climate change.
In the presence of dozens of media cameras and curious summit participants, the protesters sang songs and exchanged chants: "What do you want?" "Climate Justice" "When do you want it?" "Now!"
Thunberg did not appear unsettled by the commotion surrounding her presence.
"It's absurd. I laugh at it. I do not understand why it has become like this," she was quoted as saying by Swedish newspaper Aftonbladet, whose reporter rode with them in an electric car in Madrid.
"I don't like being at the center of the focus all the time, but this is a good thing," she told Aftonbladet. "As soon as the media writes about me, they also have to write about the climate crisis. If this is a way to write about the climate crisis, then I guess it is good."
Separately Friday, an alliance of American states, cities, academic institutions and companies opened its own venue at the U.N. climate talks, aiming to show that despite the federal administration's decision to pull the U.S. out of the Paris accord, many Americans remain committed to the treaty's goal of curbing global warming.
Elan Strait, who manages the "We Are Still In" initiative for the environmental conservationist World Wildlife Fund, said the movement is "a short-term band-aid not only to get those carbon dioxide emissions down but also to encourage policymakers to lay the ground for further achievements."
"And that, regardless of the color of the government that is in power," Strait said.
Over 3,800 organizations and corporations representing 70% of U.S. economic output have joined the coalition, organizers claim, amounting to roughly half of the country's emissions.
The U.S. Climate Action Center is hosting Mandela Barnes, the lieutenant governor of Wisconsin; Pat Brown, the chief executive of non-meat burger company Impossible Foods; Bill Peduto, the mayor of Pittsburgh; and others.
The venue is funded by Bloomberg Philanthropies, a charitable organization founded by billionaire businessman and former New York City mayor Michael Bloomberg, who is now seeking the Democratic nomination to run in the 2020 U.S. presidential election.
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