What is the inherent remedy for massacre moss surrounded by between block paving? ...
Answers: Moss grows where it's moist. So, the no chemical mode would be to keep the nouns dry. And before you use saline - remember where your brackish will be washing: right onto your grass. Salt in elevated enough concentrations will annihilate anything. Just ask the Romans about Carthage.
Keep contained by mind that the moss is reducing the surface temperature around your pavement, creating oxygen for you to breathe, providing food for other organisms, and keeping the soil from wash away from beneath your pavement. So ask yourself - do you really want to kill it?
Salt will gun down it.