to hazardous, which i guess is not great. so i started logging everything i did in my bedroom, so hopefully i could explain some of those spikes in the air quality reading. and then it was time to start the experiment. for my first high—tech intervention, i just opened the window for 2h hours to see whether luften really would make a big difference. and here are the air quality results. now what's cool about this is that all the dust spikes match up exactly with the log i was keeping. so you can see the air quality improved overnight. the dust levels went down. you can see exactly when i woke up and got out of bed and kicked up a load of dust. this is where i was sat on my bed doing some work. and then you can see later when i went to bed to go to sleep, again i kicked up a load of dust. what was surprising here was that the air quality results actually looked a bit worse with the window open for 2h hours. i don't know if that was just because there was a breeze coming in and so the dust was kept agitated and floating around for longer. it's hard to say, but if you