The teen activist has been a staunch critic of the EU’s plan to reach zero greenhouse gas emissions by 2050. She accused the lawmakers of “pretending” after they announced their plan to commit to halting climate change. The 17-year-old met with other activists in Schuman Square, just a day after she gave a speech to the bloc’s leaders.

The EU Commission’s plan was roundly savaged by critics, including Greta.

According to the MailOnline, Greta questioned why it should take 30 years for the target to be reached.

She said: “When your house is on fire, you don’t wait a few more years to start putting it out.

“And yet this is what the Commission is proposing today.”

Under the new law, each member state of the EU would reach the zero emissions target by 2050.

But led by Greta, a group of activists delivered a letter to the EU demanding more answers.

The letter said: “Net zero emissions by 2050 for the EU equals surrender.

“It means giving up.

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During her speech to Parliament, Greta said: “Here you are, trying to create laws and policies once again ignoring it.

“Pretending that your plan or policy disregarding the united science will somehow solve the biggest crisis humanity has ever faced.

“The European Union must stop ‘pretending that you can be a climate leader and still go on building and subsidising new fossil fuel infrastructure.

“We will not be satisfied with anything less than a science-based pathway which gives us the best possible chance to safeguard the future living conditions for humanity and life on earth as we know it.”