US environmentalists are urging caution developing giant wind plants off the coast of the state of Massachusetts in light of the increasing presence in nearby waters of the critically endangered North Atlantic right whale.

“We’re in a tricky situation in that these leases were issued a long time ago, and then the conditions have changed, and the whales are now in these areas,” Gib Brogan, fisheries campaign manager for environmental watchdog group Oceana, told Recharge.