Enlist four simple choices which can make a difference in our energy consumption patterns

In order to do so we can think over the relative advantages, disadvantages and environment- friendliness of the following:
(i) Taking a bus, using your personal vehicle or walking/cycling.
(ii) Using bulbs or fluorescent tubes in your homes.
(iii) Using the lift or taking the stairs.
(iv) Wearing an extra sweater or using a heating device (heater or ‘sigri’) on cold days.