bluskis
You're right! I knew I should have concentrated harder in those Organic Chemistry lessons in sixth-form, but the girl opposite had such lovely legs ...........
I'll take the hit on that one, but while we're into chemical equations, what about the other one (cloudy day = warmer weather). I know about the change in diurnal variation with cloud cover, but the simple fact is that a cloudy day is a cold(er) one.