At the Mellach coal power plant in southern Austria, spider webs have taken over the conveyor belts, and plants and flowers have sprung up around the vast lot that once stored coal.

The plant, Austria's last coal-fuelled power station, was closed in the spring of 2020, but now the government -- nervous that Russia may cut its crucial gas deliveries further -- has decided to get the site ready again in case it's needed.

"I never would have imagined that we would restart the factory," Peter Probst, a 55-year-old welder, told AFP during a visit of the plant.

"It's really sad to be so dependent on gas," he added.

Europe had been trying to move away from coal in the fight against climate change.

Austria's last coal-fuelled power station, was closed in the spring of 2020
Austria's last coal-fuelled power station, was closed in the spring of 2020 AFP / JOE KLAMAR

But as Russia has cut gas deliveries in the wake of sanctions the West has imposed on it for the war in Ukraine, European countries are turning back to coal.

Today, the Mellach plant's white and red chimney stands out amid fields of corn and pumpkins, the city of Graz in the distance.

Inside, the walls are black, and coal dust clings to the doors and railings.

Some 450,000 tonnes of coal were stored at the plant before its closure as Austria's conservative-Greens coalition aimed to have all electricity come from renewable resources by 2030.

Site manager Christof Kurzmann-Friedl says the plant operated by supplier Verbund can be ready again in "about four months" -- just in time to help tackle any gas shortages in winter.

Chancellor Karl Nehammer has insisted that the plant would only go online if necessary
Chancellor Karl Nehammer has insisted that the plant would only go online if necessary AFP / JOE KLAMAR

Chancellor Karl Nehammer insisted on Monday that the plant would only go online if necessary, while Austria holds on to its goals to reduce emissions.

"It's really an emergency measure," the conservative told foreign correspondents at a briefing.

"It's really something that shows how extraordinary our times are... We must prepare for any eventuality."

The 230 megawatt power plant would take over from the nearby gas-fired plant, also operated by Verbund, which currently supplies heating to Graz's 300,000 inhabitants, according to Kurzmann-Friedl.

He warned, however, that the site must still be readied, hooking up all the equipment again, in addition to hiring qualified personnel and above all finding enough coal.

Before, the coal mainly came from mines in Poland's Silesia region, which the Polish government is aiming to shut.

Because coal prices have risen by as much as three times since 2020, the power produced by the plant will also be more expensive, Kurzmann-Friedl said.

Criticism has already flared with the opposition Social Democrats slamming the decision to reactivate the coal plant as "an act of desperation by the Greens".

"Will the next step be the reactivation of Zwentendorf?" the opposition asked, referring to the country's only nuclear power plant.

The Alpine nation of nine million people has been fiercely anti-nuclear with an unprecedented vote in 1978 against nuclear energy that prevented the plant from ever opening.