Conservatives used a pair of secretive trusts to fund a media campaign against windfarms and solar projects, and to block state agencies from planning for future sea-level rise, the Guardian has learned.

The trusts, Donors Trust and Donors Capital Fund, served as the bankers of the conservative movement over the past decade. Promising anonymity to their conservative billionaire patrons, the trusts between them channelled nearly $120m to contrarian thinktanks and activists, wrecking the chances of getting Congress to act on climate change.

Now the Guardian can reveal the latest project of the secretive funding network: a campaign to stop state governments moving towards renewable energy.

The campaign against wind and solar power was led by a relatively new entity, the Franklin Centre for Government and Public Integrity. The Franklin Centre did not exist before 2009, but it has quickly become a protege of Donors Trust.

...The Franklin Centre purports to be a hub for a network of "citizen journalists" and "watchdog" groups reporting from state capitals. It claims on its website to provide 10% of all daily reporting from state capitals across the country. It says it is on a mission to uphold a media culture of "transparency, accountability, and fiscal responsibility at the grassroots level".