I understand the security implications, but I think I should at least have a say about what happens on my own phone
The app in question is popular and open source. My SD card's downloads folder is also unused and empty, as you can see. There is absolutely zero risk here
It's Termux, a terminal emulator for Android. I typed the top part, which starts qalculate (basically Wolfram|Alpha with units) and gives it the expression 98.32 kb to KB
I was expecting it to convert 98.32 kilobits to kilobytes, but it instead interpreted the 'b' to mean barns. The actual unit for a bit in qalculate is 'bit':
Although lightweight EVs emit an estimated 11-13% less PM2.5 than ICEV equivalents, heavier weight EVs emit an estimated 3-8% more PM2.5 than ICEVs. In the absence of targeted policies to reduce non-exhaust emissions, consumer preferences for greater autonomy and larger vehicle size could therefore drive an increase in PM2.5 emissions in future years with the uptake of heavier EVs.
An example of a very light high-speed passenger train is the N700 Series Shinkansen, which weighs 715 tonnes and carries 1323 passengers, resulting in a per-passenger weight of about half a tonne. This lighter weight per passenger, combined with the lower rolling resistance of steel wheels on steel rail means that an N700 Shinkansen is much more energy efficient than a typical automobile.
This explanation makes me feel stupid