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“Wonder gas” CFCs were invented in 1928
for commercial applications. And the use for it grew immensly. -
increasing evidence is shown that there was a connection between the ozone layer and the CFC's that awere causing the depletion of it.
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.