When it comes to Australia's largest coal mine, the Abbott government has a difficult relationship with the truth. If you haven't heard, Australia is under siege from a new kind of eco-warrior, one with a manual and money for legal challenges designed to endlessly frustrate economic development.

At the centre of this battle is the proposed Carmichael coal mine in Queensland. The mega mine, led by Indian billionaire Gautam Adani, has had its federal environmental approval set aside. Why? Because a Queensland environment group – the Mackay Conservation Group – exercised its legal rights and used a federal court challenge to expose a flaw in the government's assessment of that project.

The government now wants to remove those legal rights and hinder the ability of green groups to access the courts. The Parliament is clearly entitled to debate whether Australia's environment laws are working as they were intended. But it should not be too much to expect that the government defend its position with arguments that have some semblance to the truth. To make its case to protect growth and jobs and stop "vigilante litigation", ministers have repeatedly relied on inflated numbers, distortions and blatant inaccuracies about the Adani project to make their case. Here are some:

"This is a project that will create 10,000 jobs." Prime Minister Tony Abbott, question time, Tuesday, August 18