Thứ tự đúng của đoạn hội thoại là:
G - Do you use solar energy at home?
H - Really? And solar energy is green energy, isn't it?
A - I know. Will I have power when the sun goes down?
B - Yes, it does. But you can reduce your electric bill by using solar power. By consuming green energy, you can definitely do it.  
E - Yes, solar power is one of the cleanest sources of energy, so it can help avoid the carbon dioxide and other air pollution emissions.  
C - That's great! I really want to reduce my carbon footprint as much as possible.
F - Thanks.
D - No, I don't. Does it cost a lot to install solar panels?
I - Don't worry. The panels have solar batteries that can store extra solar power for later use when the sun isn't shining.