Welcome to your Watt costs what?

What costs more per unit: gas or electricity?
What costs more: using a tumble dryer for 1 hour or having a widescreen TV on for 5 hours?
True or False: leaving things on standby still uses electricity.
LED light bulbs can help you save energy and money by using less energy to run and lasting much longer. How long can they last before you need to change them?
Many appliances now come with energy labels to help you understand how efficient they are to run. What is the best rating an appliance can have?