First, you have to buy the powder, you know; it mustn't be wet, and it mustn't be that coarse stuff
that they load cannons with--it must be pistol powder.
Waste material is put into a grinder on the factory floor and the coarse stuff
left over is sucked through a pipe into the furnace where it is burnt, generating thermal energy.
The coarse stuff
is fine between shrubs but will only choke smaller herbaceous plants.
That way you remove much less grass each time, which makes the job easier, and the low-growing grasses will thrive while many of the taller, coarse stuff
will die off.