The environmental group is after Vattenfall's lignite business in eastern Germany, in a bid to scale back the operations put up for sale by the Swedish state-owned energy giant.
The worker who developed leukemia was exposed to less radiation than many, said authorities, which suggests that the number of compensation cases could spike.
The $3.15 billion project will tap into the world’s largest and highest grade deposit of polyhalite, used as a fertilizer, inside the North York Moors National Park.