Articles by Eric de Place

Can urban planners save the earth?

A couple of weeks ago I was in Vancouver, B.C., at a conference where it seemed like everyone was talking about a new book called Growing Cooler: The Evidence on Urban Development and Climate Change.

Reviewing dozens of empirical studies, the book's central argument is that urban form is inextricably linked to climate. Low-density sprawl has been a principal contributor to North American climate emissions. And by the same token, smart compact development -- the kind that fosters less driving -- is essential to curbing climate change.

From the executive summary:

Does anyone choose to live in a condo?

One of the curiosities of language is that our usage can sometimes inadvertently reveal our underlying beliefs. Consider how condos are often described as if they are conscious actors who perform actions, such as "packing people together."

One example comes from the Seattle P-I: "Now, condominiums are building upward, packing people into to what used to be inexpensive property." According to this way of writing, it's the condos, not the owners, that have what we philosophy majors call "agency."

This is just weird. Admittedly, I don't get out a lot, but I've never seen condos roaming the streets, rounding up suburban residents, and stuffing the poor saps into boxes. I've always been under the impression that developers build condos in urban neighborhoods because there are lots of people who want to live in them.

Single family homes, by the way, aren't given the same treatment in our usage.

Can planting trees offset your carbon footprint?

When my wife and I bought our house, the yard was typical for our neighborhood: a mostly barren plain of lawn so sunbaked that you could bounce a tennis ball off it. So being eco-groovy types, we've tried to improve the place: we put in a rain barrel, built a natural drainage system, and added topsoil planting berms. But I'm most proud of the trees we've planted: a pair of akebono cherries in the parking strip and a white-star magnolia in the front yard; and in the backyard, a shore pine, a Chinese dogwood, a couple of vine maples, a Japanese maple, and a limelight cypress.

I recently began wondering how much carbon our new trees are soaking up. Since tree planting is the sine qua non of carbon offset programs, how much of my emissions are offset by my yard? Enough, perhaps, to justify moving from a dense, highly walkable neighborhood to a still-urban but less foot-friendly place? (My Walkscore dropped from 92 to 80.)

The answer, I'm afraid, is "no."

I estimate that in an average year my nine trees will soak up right around 100 pounds of carbon-dioxide combined. (Brief methodology note at the end of this post.) That's the emissions equivalent of burning five gallons of gasoline -- or actually just four gallons, if you consider the "lifecycle" emissions of gas. In other words, my tree planting allows me to burn about one-third of a tank of gas guilt-free each year.

That's certainly better than nothing. But then again, the average American is responsible for about 45,000 pounds of yearly CO2 emissions from energy use alone. Nine trees like mine offset about 0.2 percent of those emissions -- and much less when nonenergy sources are considered.

Even giving myself a big benefit of the doubt -- my electricity is carbon-free hydropower and I take other steps to reduce my climate footprint -- it's highly unlikely that my trees are offsetting more than half a percent of my annual emissions. Plus, half of those tree offsets belong to my wife. So that means at the very, very most I'm offsetting about one-quarter of one percent of my own emissions.

I could do more for the climate by simply avoiding a couple of trips in my car.

Responsible climate policy means reducing transportation emissions

In the Northwest, it's impossible to address climate change without doing something about transportation. Take a look at this chart showing CO2 emissions from fossil fuels in Washington.

In Washington (as in Oregon), everything else pales in comparison to the emissions that come from transportation. In fairness, the chart above shows only emission from fossil fuels. But fossil fuels represent better than four-fifths of the state's entire portfolio of greenhouse-gas emissions [MS Word doc]. They're also the emissions that are best understood, and by far the most practical to cover in carbon legislation, such as cap-and-trade systems.

Whether we aim to reduce our climate emissions by 80 percent below 1990 levels (the amount that scientists say is necessary in the developed world if we're to slow climate change) or by 50 percent (the target that the state's leaders have proposed), there's pretty much no way to get around making big cuts in transportation emissions.

On a related note, the Western Climate Initiative -- the group of western states and provinces setting a joint climate strategy -- just announced their shared target. I was actually a bit surprised when I saw the numbers.