To add to the advice that it's a political problem - you should think of ways of using your tech skills to provide leverage to campaigners. Build a proof of concept and approach NGOs and campaign organisations to see if they would sponsor you. There may also be PR firms with ethical agendas (if that's not a contradiction).

Some ideas off the top of my head - visualisation tools (mapping large offenders and their carbon footprints, tools for unearthing dirty money flows). Ways of reaching potential converts more effectively. Ways of linking people to green energy sources and products.

The 'greed camp' have been using tech very effectively to convince people nothing bad is happening. Use their own tactics against them.