I write open source software, run the Human Organ Atlas, walk as much as I can, and am worried about the climate.
Long distance paths I've walked:
I've also walked lots of the South English coast, which started after an aborted attempt to walk across the Pyrenees. One day maybe I'll finish my walk around England, closing the loop with Offa's Dyke Path and Hadrian's Wall. Here's my progress so far: