Toaru Majutsu no Index

[KrayZ33]

he compresses air which will lead to heat -> heat will lead to a dust explosion

edit: oh I misunderstood you guys ^^ you were talking about whether he is able to controll heat directly or not?

btw

Dust Explosions aren't necessarily started with heat, they are nearly always caused by a spark

the spark starts the dust explosion because of the high heat and temperature reached in the spark... so it's the same cause -> heat.