Americans have a president whose hatred of windmills is epic. He thinks they’re cancer-causing bird killers that drive down property values, and he fought against putting them within sight of his golf course.

Trump renewed his attack against wind power during a rambling speech at a National Republican Congressional Committee dinner last night.

Trump, who doesn’t acknowledge climate change and has staunchly opposed wind-generated power, often outlandlishly criticizes renewable technology as he lauds coal and other traditional fossil fuels.

Scientists call Trump’s opposition to renewable energy “malicious ignorance.”

Trump’s most common line of attack on wind power is that the turbines kill birds—they do, but at a far lower rate than other energy sources—and that reliance on turbines (which he seems to confuse with windmills) would mean no electricity when there is no wind—an argument nullified by the existence of battery storage.

Last night, he mocked wind power as part of an attack on his former presidential opponent Hillary Clinton, who proposed greater investment in wind turbines to reduce reliance on traditional fossil fuels and bring down carbon emissions.

“Hillary wanted to put up wind. Wind,” he told the crowd. “If you have a windmill anywhere near your house, congratulations, your house just went down 75 percent in value.” He then introduced his newest argument, telling the audience, “And they say the noise causes cancer,” before mimicking the sound of a turbine as the crowd laughed and applauded.

There is no evidence that the noise of a wind turbine causes cancer.

Anti-wind power groups have incorrectly claimed that the low-frequency noise—known as infrasound—given off by turbines can cause health problems including nausea, sleep loss and anxiety, among many other symptoms.

No research has ever shown that harm came from such low frequencies, and no cancer of any kind has been linked to high levels of noise.

Chemicals and patriculates released in the extraction, storage, transportation and burning of coal and other fossil fuels, however, have been associated with higher rates of cancer.

The graphic below, provided by Statista, illustrates projections for the generation of electricity from renewable sources in the U.S.

Despite Trump’s continued opposition, the U.S. wind energy industry is growing.

According to the American Wind Energy Association, the industry supported more than 100,000 jobs in 2017 and provided 6.3 percent of the nation’s energy.

The Energy Information Association said wind power was on track to surpass hydropower as the country’s largest source of renewable energy by 2019.

Trump fought for a decade against the Scottish government’s effort to install a renewable energy wind farm off the coast of Aberdeen, which could be seen from his eponymous golf course there.

He called them a “horrible idea” and “ugly” in court documents.

The case of Trump vs. the Scottish windmills went to the UK’s Supreme Court in 2015.

The wind farm was completed in 2018.

In February, adding insult to injury, Trump’s golf course was ordered to pay the Scottish government’s legal bills from the case.

Trump does not have quite the same disdain for offshore oil drilling, which his administration has pushed through an executive order, although it exempted Florida, where Trump owns seaside property.

A judge in Alaska recently blocked Trump’s drilling effort for Arctic waters and areas in the Atlantic ocean.