I’ll give this to the climate change crowd: They have remarkable message discipline.

MSNBC regular Michael Mann, for example, used the deadly tornadoes that ripped through Kentucky this weekend, leaving as many as 100 people dead, as an opportunity to promote President Joe Biden’s climate agenda.

In covering the chaos and tragedy in the Blue Grass State, MSNBC’s Andrea Mitchell this week hosted Mann, who is a professor of atmospheric science at Pennsylvania State University.

“Let's talk about this historic storm,” Mitchell began, “the context, just how severe these were, how surprising they were, and how warmer temperatures may or may not have contributed to it.”

Mann, who has just published a new book on climate change, responded, “What we can say is that we have a very warm planet right now. … We had temperatures in the 70s and 80s Fahrenheit over the last week in a large part of the midsection of the country. And so that heat, that moisture provides the energy, the fuel, the turbulence that allows large thunderstorms to form and large squall lines like we saw with this storm.”

He added, “That's one of the ingredients that you need for a tornado. You need all of that moist energy in the atmosphere, that turbulence, and instability that allows you to build large thunderstorms, but you also need spin in the atmosphere, and that happens when you come into contact with the jet stream, and so all that warm moist air is coming into contact with the jet stream. … If you look at the data, there is a trend towards these larger outbreaks, these larger tornado outbreaks.”

Mitchell oh so solemnly marveled at the carnage.

“The debris was thrown up, and you can only imagine what happens when it comes down again,” she said. “Let's talk about the climate change ingredient in here, and there have been reports that tornado alley is going to be moving east as climate change, global warming affects our country.”

Mann continued, noting the “jet stream is changing.”

“And we've learned by hard lessons how to change construction,” said Mitchell. “The Japanese have learned this as well, and other places around the world, to deal with earthquakes and to deal with hurricanes. Look at New Orleans coming back from death and destruction. What do we need to learn about how to build better in the southeast, let's say, and the Midwest?”

The answer, according to Mann, is to pass Biden’s multitrillion-dollar climate and social spending plan.

“You need to pass Build Back Better,” he said, “because that bill has climate provisions that will address this problem at its core, which is the warming of the planet due to carbon pollution, fossil fuel burning.”

He added, “So, that's most important. We can prevent this from getting worse if we act on climate now.”

You almost have to admire the climate change crowd’s ability to stay on message, even if it means delivering it from atop a pile of corpses.