'Mike' wrote:
Now a question. If Bubble wrap slows things down, why is a short cut to put
tomatoes in a paper bag to ripen them ;-))

Because a paper bag will trap the gasses, but not stop light getting to the
leaves. Bubble wrap, if the assertion that it does stop ripening is correct
(I've no experience of it), would be because it's blocking light to the
leaves, not just the tomatoes.