“The success of this international effort has been stunning. The phase-out that followed the first protocol in 1989 was rapid. **Within a year, the use of ozone-depleting substances fell 25% below its 1986 levels. Within a decade the levels had fallen by almost 80%**. This was far beyond the initial target of a 50% reduction. As of today, they have fallen by 99.7%. ([Location 947](https://readwise.io/to_kindle?action=open&asin=B0C3X6X695&location=947))” --- **Tags** -- [[quotes]], [[conditional-optimism]], [[technology]], [[ozone-layer]], [[climate-change]], [[pollution]], [[public-policy]], **Source** -- [[260103133118 - B - Not the End of the World]]