I assumed that the trolly company would need to clean up the mess, with lots of construction equipment, and would replace the trolly, incurring the cost of buil

I assumed that the trolly company would need to clean up the mess, with lots of construction equipment, and would replace the trolly, incurring the cost of building a new one. I guessed that the CO2 emissions from that result would dwarf the emissions of the extant one, so I left it alone.