In 2012, Burning Man organizers reimbursed the BLM nearly $1.4 million in expenses, a 60 per cent year-over-year increase, though the event population increased by only 4 per cent that year, according to the lawsuit. The following year, the same bill was $2.9 million, according to the lawsuit. In three years, the cost recovery charges increased by 291 per cent, and the Burning Man event population increased by 39 per cent, Black Rock City attorneys said. CBC (AP)