Harriet's electric personality wreaks havoc on the city.
HArold discovers saving electricity can be explosive.
Ashwin finds and eco-friendly way to relax.
Nellie reveals the pros and cons of recycling.
A school protest over junk food has some unusual consequences.
Nellie discovers beauty and the beast.
What happens when the fish don't bite?
Harriet becomes toxic to all those around her.
There's a foul smell on "Spare the Air" day.