Besides work too much, what can one do in a trip to San Francisco?
See new family:
Celebrate Christmas in February:
Forget your bike shoes at home, but fortunately find normal pedals and a pedal wrench in the car:
Take the ferry back from San Francisco:
Have a light dinner:
Be the only person to bike to the grocery store – just as well there is only one pole for bike parking:
Remember your bike shoes:
CO2 emissions ZRH-SFO roundtrip: 2000kg – 10,000kg / person (depends on web calculator program such as www.climatecar.org or www.terrapass.com)