In a surprise move, the Supreme Court recently ruled in favour of Smith's climate case finding that he has the right to sue the seven big companies - including Fonterra - for their role in 'causing' climate change.
The court said these companies may be liable for the harm their climate pollution causes.
In a statement, Smith said he's "delighted with today's decision, and it is a vital step in holding climate polluters to account. The planet is burning, and we need to hold those responsible to account".
Those of us who have been around the traps a while will well remember Smith cutting down the lone pine tree on One Tree Hill in Auckland.
Not sure how the supposed eco-hero's actions in that case saved the 'planet from burning'.
