Treetop trekking places do this. Forget what they're called but the safety line clips into a sort of box with angled wheels that rides along the cable. The wheels are close enough so the cable doesn't slip through, but there is a gap at the top between the pairs of wheels so the brackets holding the cable can pass through. That's maybe a poor description, but it's like a U-shaped bracket with wheels at 45 degree angles at the top of rack side of the U.

Building on what others have said regarding high indoor humidity being the cause. Some other things you can do:

Make sure there is good airflow to the windows. During the day open curtains or blinds, move obstacles that might block airflow (like a big couch in front of the window), take off screens if they're on the inside. All of this will help get warmer air to the windows to dry them. (Mine get some condensation overnight, but then dry during the day).

Make sure you're getting enough fresh air in (in the winter, this fresh air will also be dry air). Ideally through an HRV, but if not, run your exhaust fans for a while to draw some in.

As others mentioned, if it persists and this stuff doesn't help, try a dehumidifier.

Baseline selection. I see this one alot where people will show values relative to a baseline year or whatever, but the baseline is cherry-picked to fit their narrative.

This is a good point in that these presentations CAN be used to mislead but can be used to highlight useful information. But they should be transparent and provide that context.

Yeah, I don't find this intuitive at all. 636M in gross profit splits into operating income and operating expenses where one is -ve and one +ve but they look the same??

I would recommend this episode of Radiolab: https://radiolab.org/episodes/great_vaccinator

About Maurice Hilleman who created over 40 vaccines. If I remember correctly, they talk about trials for the polio vaccine and how hard it was knowing that some of the children that were in the study who got the placebo would die, when if they had gotten the vaccine they would have lived. Roll of the dice.

It's not a comprehensive examination of the ethics, but interesting hearing their first-hand experience grappling with it.

You can. People calculate the carbon footprint of big complicated things. But you end up balancing accuracy with effort.

You might be able to calculate some stuff using a bottom-up approach. Like you said, direct emissions wouldn't be too hard. Travel emissions would be a bit trickier, but maybe you have location data of ticket pruchasers that can be used or maybe you make some assumptions around travel distance and travel mode (assumptions could be based on a surveyed sample of attendees or something else). Similar with logistics. Some data might be available, some you might to assume. For all the disposable stuff, you might be able to get total volume or weight purchased and then use some general emission factor for plastic production/shipping. For things that are particularly challenging bottom-up, you can use top-down economic input/output models (e.g. $X of spending in this sector results in Y tonnes of GHG emissions).

TL;DR: Yes, it is possible but for things that complicated there are tradeoffs between accuracy and effort to quantify.