Recreational marijuana may still be illegal in Canada and elsewhere, but that hasn't stopped modern technology from marching in and helping "heads" enjoy their poison of choice safely and more subtly than by burning it.
That's because vapourizers don't actually combust the herb; instead, they heat it up to a point where it releases its "goodness" without actually setting it on fire. The result can be less marijuana consumption (vaping uses less than, say, rolling the stuff up into papers), less of that obvious marijuana smell and - perhaps most important - less chance of harmful gases from combustion going into the vaper's lungs.
If you can believe politicians, it may be only a matter of time before the casual use of pot becomes legal in Canada. Prime Minister Just-in Two-d'oh! made legalization one of the major planks during his successful campaign to replace Stephen Harper's Conservative government and perhaps someday he'll make good on that promise.
Then again, he's a politician - and a Liberal one at that - so his promises may not be worth any more than the hot air with which he exhaled them. But recent history in other jurisdictions seems to point toward the evil weed not being considered so evil anymore, so time will tell what happens here in the Great Green North. Heck, I know a guy who jokes that the stuff should be mandatory, so some "tightly wrapped" folks can "lighten up".