A stocking full of coal or an atmosphere full of gas?

The more concerned about climate change we get, the more difficult it can be to absorb the only thing more invisible and pervasive than greenhouse gas: guilt. Taking the weight of an entire planet on your shoulders is tiring work, to be sure, and every decision we make to reduce our carbon footprint seems impossibly insignificant when compared to kilotonnes of annual Canadian emissions.

But if years of dealing with crushing guilt has taught us anything, it’s surely that the best (or, at least, easiest) way to defray our feelings of inadequacy are to point fingers. And where better than into our past?

While conventional wisdom tells us that our current levels of pollution far outstrip our past’s, researchers at Reno, NV’s Desert Research Institute have found the highest levels of heavy metals in arctic ice from the periods of highest coal use, namely about a century ago. Taken from Greenland, the core samples suggest that it was during the time that North America and Europe were still voraciously consuming impurity-laden coal that the most pollution was created, as much as two to five times more than our current levels, which are a byproduct of cleaner-burning oil and gas.

It’s important not to read too much into the discovery, assuming, that is, you’re held back by the bounds of personal environmental restraint and the recognition that making more responsible choices about your energy use is an important responsibility.

In the absence of those, however, you’re free to blame your great-great grandfather for everything from the melting arctic ice shelves to your disappearing beer. Personally, I never liked him anyway.