“I’ve been [in] helicopters in the West, in the Southwest and Northwest, flown over more land burned to the ground, all the vegetation gone, than the entire state of Maryland,” Biden told his audience, partly referring to the wildfires now raging in Texas. “The idea there’s no such thing as climate change, I love that, man," the president added with evident sarcasm. "I love some of my Neanderthal friends who still think there’s no climate change.”
The root cause is well known - greenhouse gases, largely from extracting and burning fossil fuels:
That article is hardly worth reading though. Salon comments on an inaccuracy in a half sentence of a Biden speech that is the subject of enraged Fox News coverage for other reasons.