Around 50 campaigners held a silent protest inside Heathrow airport’s Terminal 5 on Sunday of last week.
They wore breathing masks to highlight the air pollution that a third runway would bring.
The Airports Commission has announced a further consultation into air pollution at Heathrow.
And the Supreme Court has ordered the government to produce new plans on tackling air pollution.
The Climate Coalition—an alliance that includes the Campaign against Climate Change—has called a mass lobby of parliament on Wednesday 17 June.
The Tories’ manifesto calls for scrapping support for onshore wind farms while expanding dangerous fracking and nuclear power.
Transport to the lobby is being organised from around Britain.