It has been suggested that radical environmentalism is a religion because its believers act more on an unshakable set of beliefs than on skeptical scientific analysis.  If this story out of the UK is part of a larger trend, some followers of that religion are adopting a position similar to that of the celibate Shakers, but perhaps without all of that vanished sect's appreciation for genuine simplicity as opposed to pseudo-intellectual fashion.  It seems that young women in the UK who are deeply concerned about the future of the planet are seeking to have themselves sterilized.  One of the women interviewed for this story talks about how she and her like minded husband often go away for the weekend and how they just returned from a vacation in South Africa.

"We feel we can have one long-haul flight a year, as we are vegan and childless, thereby greatly reducing our carbon footprint and combating over-population."