For a journey of 350 miles (e.g. Cambridge to Edinburgh), one person in an average car would emit 108kg of CO2. This compares to 99kg per passenger in a plane, 50kg per passenger in a coach and 34kg per passenger in a train.
Total solar energy received in December is a 10th of that received in June.
Shower flow rates have no upper limit in the UK - but in the US there is a maximum flow rate of 9.5 litres per minute.