Morgan: But we are up North! In the North, there isn't as much sun in the winter. And that is when it's the coldest!
Ryan: Yeah, and what about when it is cloudy outside? They can't work then.
Inukshuk: Actually, the solar walls work very well in a place like Rankin Inlet. Because the snow reflects sunlight so well, there is more light - and therefore more heat - hitting the walls. And, the walls are so well designed that even when it is cloudy, they can heat the building. Even if there is just a little twilight, the solar wall is effective.
Ryan: But how does that make a difference with climate change?
Inukshuk: Well, it reduces the need to burn fossil fuels like oil or diesel, which emit greenhouse gases, resulting in global warming. It also saves money - burning fossil fuels to heat buildings can be very expensive in the North.
Morgan: Every school should have a solar wall!
Inukshuk: Lots of different buildings can use solar walls. They can be used on almost any type of building, from houses to apartment buildings to schools, both in the North and in the South. In fact, the biggest solar wall in the world is at a factory in Montreal.