Austria is seeking support from other European Union countries for its legal challenge to the bloc’s rules labeling investments in gas and nuclear power plants as climate-friendly, climate minister Leonore Gewessler said on Wednesday, Reuters reported.

The Austrian government, which has also criticized an EU plan to label gas, a fossil fuel, as green, has prepared a lawsuit to challenge an EU law to include the fuel in a "taxonomy" system for labeling green investments.

“We have several other states who’ve been very critical of, and very vocal also in their criticism, on the delegated act. And so we will also look for further allies in the lawsuit,” Austrian climate minister Leonore Gewessler said.

Luxembourg has already supported the lawsuit.

The gas and nuclear rules have been the subject of intense debate throughout the year, with EU governments deeply divided on the issue. The European Parliament last week approved a law that Brussels says will help the EU switch to clean energy, but which campaigners say undermines Europe's leadership in fighting climate change.

“We will file a lawsuit at the European Court of Justice to prevent this greenwashing programme,” Gewessler said when she arrived at a meeting of EU environment ministers.

In the lawsuit, Austria intends to prove that none of the fuels deserve the green label. When burned to produce energy, gas produces emissions that warm the planet, fueling climate change. But it produces fewer emissions than coal, and some EU countries see it as a temporary alternative to dirtier fuels.

The suit will also question whether Brussels had the power to make the rules using a “delegated act”, a type of law that EU countries and lawmakers can veto, but cannot make changes to.

The head of EU financial services, Mairead McGuinness, said last week that the law ensures that private investment in gas and nuclear power will meet "strict criteria." The EU taxonomy does not prohibit investments in fuels that are not labeled clean.

Austria's lawsuit could be filed in a few months, after the law takes effect.