Question

how has the montreal protocol been amended over time? by reducing the phase - out period for ods by eliminating all ozone molecules to reduce the number of countries involved

Explanation:

The Montreal Protocol aims to protect the ozone - layer by phasing out ozone - depleting substances (ODS). Amendments have been made to speed up this process by reducing the phase - out period for ODS. Eliminating all ozone molecules is not the goal as ozone in the stratosphere is beneficial. The protocol has expanded the number of countries involved, not reduced it.

Answer:

by reducing the phase-out period for ODS