The Construction, Forestry, Mining and Energy Union has launched a series of advertisements promoting the mining tax to counter magnate Andrew Forrest's criticism.
CFMEU secretary Tony Maher said the advertisements would counter the anti-tax campaign waged by the mining industry.
He said while the public regularly heard about the damage the tax would do to resources companies it rarely heard about how it could deliver benefits to non-mining workers.
Maher also said the billionaire mining magnates leading criticism of the tax did not speak for the majority of Australians that were suffering from the mining boom's adverse impacts.
The union advertisements are timed to coincide with Fortescue Metals Group chairman Andrew Forrest's National Press Club address today.
In his speech Forrest will talk about indigenous disadvantage, a topic he has criticised the Government for on top of the mining tax.