Nga s family wants to reduce their energy consumption. Nga and her brother will go to school by bike, while her mother will take the bus to work. Tomorrow, her mother wil buy some low energy light bulbs to use in all rooms. Besides, at 5 o’cloock tomorrow afternoon, dad will be putting solar panels on the roof their house. From next week, all the water in Nga’s house will be heated by solar by solar energy. Nga also tells her brother to turn off the lights when he gets out of the room. Nga and her family feel happy that they have small carbon footprint because they are using less energy that produces carbon dioxide.
 1.how will nga's mother go to work to reduce energy consumption? 
 2. what will her father be doing at 5 o'clock tomorrow afternoon?
 3. what does nga also tell her brother to do?
 4. why do nga and her family feel happy?