Labour’s push for economic growth at the expense of climate and nature is “extremely dangerous”, the co-leader of the Green party has said.

Adrian Ramsay, the MP for Waveney Valley between Norfolk and Suffolk, was one of the five Green MPs elected to parliament last July in their best ever result. He said and his colleagues knew they would be holding Labour to account, but did not expect to be as disappointed as they have been.

In recent weeks, Labour has given the green light to airport expansion and vowed to change planning rules to deprioritise nature, while ministers have repeatedly disparaged bats and newts and ridiculed measures to protect fish. The chancellor Rachel Reeves has suggested economic growth trumps the government’s legally binding target of reaching net zero emissions by 2050, and there are suggestions the national wealth fund, meant for green projects, will be coopted for defence.