I manged to get a Geiger tube nice and cheap the other week... Just a pity I'm having trouble getting the circuit to work... Means that I'll have to trace through the circuit, borrow test instruments... Massive pain to do, but essential if it's to work. Fortunately, the test equipment is to hand - and so are plentiful replacement parts. Whether much in the way of spare parts would be available post-cataclysm. Not to mention all the work that would need to be done.
There have been a few natural environment problems recently. If 20 million people in an techno-industrialised country were to be affected, what then? What if 200 million people were affected? How much help would developing countries be willing or able to help?
On the bright side, more (hobby) farm work has been done. A couple of new plants - including native ginger, being used more as a decorative, but still edible. A couple of dying ones (one coffee seedling trunk broken), one peach not responsive to the arrival of Spring (the other quite happy). Fortunately, the persimmon has leaf buds about to open.
Which reminds me - I have to find enough of the right bits to make a pulping machine to make paper, or separate fibres from hemp (or similar)... and have to play with the glassware (and get some more) and try some bootstrap chemistry.