Greta Thunberg detained by police during eco protest in German village

Greta Thunberg has been detained by police during a demonstration in Germany.

The environmental activist, 20, has been taking part in protests against the demolition of a village to make way for the expansion of a nearby coal mine.

Luetzerath has become the frontline for Germany's climate debate.

It is the second time that the Swedish activist, who joined protests on Saturday, has been moved on by police in the village this week.

The local Aachen police force said Ms Thunberg was part of a group of protesters that "stormed" towards the edge of the open-cast mine, described by officers as "steep and extremely dangerous".

The force said the activist was not arrested but was instead carried along with other protesters for identification.

She was released after a brief detention, police confirmed.

The tiny hamlet of Luetzerath, in North Rhine-Westphalia, is owned by utility firm RWE and has been emptied ahead of its demolition to allow for the expansion of the nearby Garzweiler coal mine.

Ministers and RWE say that lignite, a form of coal regarded by activists as the most health-harming, dug up from the mine will ensure Germany's energy security in the short term.

Firing up the fight after government backtrack

The government, which is a three-way coalition including the country's Green party, has had to adapt its attitude to the use of coal after Russia's invasion of Ukraine.

The country has in the past been heavily reliant on Russian gas for its energy, but supplies have been reduced in response to European sanctions.

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The government insists, however, it is still committed to eliminating the use of coal in the long term.

It has pledged to bring forward plans to phase out coal by eight years to 2030 in North Rhine-Westphalia, the state in which Garzweiler lies.

Environmental activists want Germany to take immediate action on fossil fuels and are opposing the expansion of the coal mine.

They say bulldozing the village to make way for the site would result in huge amounts of greenhouse gas emissions from the mined fossil fuels.

'Hundreds hunkered down in abandoned village'

Protesters moved into the abandoned homes of former residents two years ago.

The group LuetziBleibt - which translates as Luetzi is Staying - claimed earlier this month that there were "around a couple of hundred people" hunkered down in the village.

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Police in riot gear moved into the village earlier this month in an attempt to clear the protesters out.

Since then, roadblocks have been removed, treehouses built by protesters have been chopped down and buildings have been bulldozed.

Ms Thunberg joined protesters on Saturday and gave an impassioned speech in which she said Germany was "embarrassing itself right now".

"The science is clear: we need to keep the carbon in the ground," she said.

Police have said it could take weeks to resolve the standoff over the coal mine expansion, which activists see as a symbol of Berlin's failing climate policy during an energy crisis in Europe's biggest economy.

The regional and national governments reached a deal with RWE last year allowing it to destroy the abandoned village in return for ending coal use by 2030, rather than 2038.

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