4 ms·
For the UK, the main criteria is latitude. It's only next month in April that, even when it's sunny, people in the UK can start to get vitamin D from the Sun.
by chippy 9y ago
For the UK, the main criteria is latitude. It's only next month in April that, even when it's sunny, people in the UK can start to get vitamin D from the Sun.
(The UK is at the same latitude as Vancouver)
- mkempe 9y agoIndeed. Look for the "UV index" in your local weather reports. If it's below 3 [on a sunny day, during wintertime] it means that the low angle of the sun, even at noon, reduces UV intensity to such an extent that your skin cannot produce vitamin D.
- stordoff 9y agoMost of it is further north AFAICT - the south coast of the mainline is roughly inline with Vancouver, but then it extends a substantial distance north.