The Science Is Clear: Offshore Wind Isn’t What’s Killing Whales

Politicians and nonprofit groups have blamed offshore wind turbines for whale deaths, but the science doesn’t support those claims—at all

Lines of tea lights formed the large, softly flickering outline of a whale’s tail in the sand along the Jersey Shore this past October—another installment in months of protests against planned offshore wind projects in communities along the U.S. East Coast that have rallied around the slogan “Wind Kills Whales.”

This claim has been used as a talking point against wind energy by former president Donald Trump, local Republican politicians, nonprofit groups with links to the fossil-fuel industry and more than 50 Fox News segments in 2023. All have connected offshore wind development with horrific images of dead whales washing up and decaying on beaches. At a recent New Jersey campaign rally, Trump vowed to scrap the country’s offshore wind projects on the first day of a new term if he is elected again in November, declaring that “they kill the whales.”

But the current scientific consensus doesn’t back up those assertions—at all. There are “no links whatsoever between the offshore wind development activity and especially the humpback whale mortalities. None. Zero,” says Duke University marine scientist Douglas Nowacek.

The protests and spurious criticisms come at a crucial—and financially precarious—time for the nascent offshore wind industry. Some 30 gigawatts of offshore wind energy (enough to power 10 million homes and offset the annual emissions of around 18.5 million passenger vehicles) need to be deployed by 2030 to meet the Biden administration’s pledge to make the power sector carbon-pollution-free by 2035. And the warming caused by those emissions does have a demonstrable impact on whales.

That isn’t to say that building huge wind turbines in the ocean doesn’t come without any environmental ramifications. “Even offshore wind proponents such as myself recognize that walking out my front door has an impact, so of course building large-scale machines in the ocean will have an impact,” says Kris Ohleth, executive director of the nonprofit Special Initiative on Offshore Wind. She, Nowacek and other experts say the key task is to understand what the potential harms of turbine surveying and construction actually are and then mitigate them.

So what is killing whales?

Several whale species dwell in and migrate through the North Atlantic, including in waters near the coastal U.S. Though populations of many of these endangered or threatened species have considerably rebounded from the effects of 19th-century whaling, significant threats remain. More than 500 humpback, minke and right whales have been seriously injured, stranded onshore or died prematurely on or near the East Coast since 2017, according to the National Oceanic and Atmospheric Administration.

Conducting necropsies on beached whales to pin down a cause of death is made difficult by the animals’ layer of blubber and by the fact that organs can literally cook inside a stranded whale. But it is starkly clear that human activity—in the form of ships that hit whales or fishing gear that wraps around them—is often to blame. “For right whales, if you take out neonatal mortality, every documented mortality in the last 25 years of a right whale has been at the hands of some human cause—ship strike or entanglement,” Nowacek says. “Every single one of them.” The New England Aquarium recently reported that a female North Atlantic right whale known by the name Shelagh had become tangled in fishing gear for the fifth known time.