Marijuana smoke harms lungs in tobacco smokers, study finds | CNN

"If you're smoking an unfiltered joint, let's say, more particulates will reach the airways, get deposited and become irritants, which is why you see the mucus and the inflammation," she said. 

 In addition, tobacco smokers quickly exhale, while marijuana smokers often inhale and hold their breath to maximize the high, she said. 

 "People usually have a longer breath hold and a higher puff volume, so they are holding in the larger volume of smoke for a longer period of time," she said. "That could lead to micro-trauma of those airspaces. These are all questions for future research."…

https://www.cnn.com/2022/11/15/health/marijuana-lung-damage-study-wellness/index.html

E-cigarettes linked to lung problems, first long-term study on vaping finds

The first study on the long-term health effects of electronic cigarettes finds that the devices are linked to an increased risk of chronic lung diseases, according to research published Monday in theAmerican Journal of Preventive Medicine.

https://www.nbcnews.com/health/vaping/e-cigarettes-linked-lung-problems-first-long-term-study-vaping-n1101641

18 Year Old Warns Against Juuling After His Lung Collapsed - Newsweek

An 18-year-old student from Florida — who now says he is never smoking again — is warning of the dangers of vaping after his left lung collapsed on Monday. Chance Ammirata used to smoke one Juul pod every couple of days, which is the equivalent to around 10 cigarettes worth of nicotine. Now he is urging people to throw their vapes away. ....
https://www.newsweek.com/florida-teenager-warns-against-juuling-after-his-lung-collapsed-1453253

Wisconsin Health Officials Urge People to Stop Vaping After a Sudden and Mysterious Rise in Lung Disease - Gizmodo

More people hospitalized with serious lung problems linked to vaping have been found, Wisconsin health officials reported Friday. ....
https://gizmodo.com/wisconsin-health-official-urges-people-to-stop-vaping-a-1836921788

Vaping: E-Liquid Chemical Linked to "Popcorn Lung" Harms Cells in Airways | Inverse

In 2007, health officials in California revealed that numerous workers in local flavoring factories suffered from a rare, life-threatening lung condition called bronchiolitis obliterans, later nicknamed “popcorn lung.” The illness, which scars the air sacs of the lungs and makes breathing difficult, stemmed from exposure to diacetyl, a yellow chemical used to give microwave popcorn its buttery flavor. ....
https://www.inverse.com/article/52946-popcorn-lung-chemical-diacetyl-found-in-vape-juice