The first summit of environmental activists with the intention of establishing an environmentalist party was held on 7 October 2009, organized by biologist and employee of the Ministry of Environment Juozas Dautartas.

The impetus for the party's formation came in ongoing discussion over the fate of the Ignalina Nuclear Power Plant.

The party opposed projects to replace it with the planned Visaginas Nuclear Power Plant and demanded a referendum alongside the Lithuanian Farmers and Greens Union.

Saulius Skvernelis entered discussions on joining the Green Party before choosing to establish the Union of Democrats "For Lithuania" instead.

The party's list in the 2024 European Parliament election was the first in the country's history to only include female candidates.

[14] During the electoral campaign for the 2020 parliamentary election, it vowed to achieve net zero emissions by 2040, encourage companies to switch to the four-day work week through tax rebates, abolish VAT for electric vehicles, and raise the monthly minimum wage to 1000 EUR.