A report this week that air pollution, particularly ground-level ozone, is a more serious problem in Canada than previously thought got me to thinking about this stuff that we breathe. What is air? It’s a question we don’t ask very often, because we generally take air for granted. Air is the mixture of gases comprising …
Tag: Earth
The ocean
I’ve always been fascinated by the ocean: the endless rolling of the waves, the water’s changing moods, the limitless horizon. Or maybe it’s just because, coming from the dry prairies, I’m amazed that anything can be that big and wet. How big and wet? The ocean covers 71 percent of the Earth’s surface: 361 million …
Ice ages
I like ice. When I order a drink at the movie theatre, I always ask for “more ice than you think anyone can possibly want.” At home, I drink iced tea. When I finish my drink, I eat the ice. But I prefer that ice keep to its proper place–which is not on the roads, …

