The Medway Handyman wrote:

[...] (2) what happened to the hole in
the ozone layer, which meant we were all doomed?

"Since the adoption and strengthening of the Montreal Protocol has led
to reductions in the emissions of CFCs, atmospheric concentrations of
the most significant [ozone depleting] compounds have been declining.
These substances are being gradually removed from the atmosphere. By
2015, the Antarctic ozone hole would have reduced by only 1 million km²
out of 25 (Newman et al., 2004); complete recovery of the Antarctic
ozone layer will not occur until the year 2050 or later. Work has
suggested that a detectable (and statistically significant) recovery
will not occur until around 2024, with ozone levels recovering to 1980
levels by around 2068."

Extract quoted from http://en.wikipedia.org/wiki/Ozone_depletion which
is well worth reading.

--
Andy