The message
from Jim Elbrecht contains these words:

20 years [or so] ago our Governor wanted to show off his new infra-red
technology for busting rural pot growers. He, the gendarmes & and a
handful of reporters started cruising rural Schenectady county NY in
several helicopters. Their new toy spotted a field with several
plants & they set down to make a huge and very public bust---- but it
turned out to be tomato plants.

In Scotland, growers use the attic space, where visitors never go and
grow-lights don't show. Attics in Scotland are cold, so they have to
heat the plants.

The police helicopters use a heat-detector to spot roofs which are
radiating more heat than normal :-)

Janet.