Written by Lisa Hymas for RH Reality Check. This diary is cross-posted; commenters wishing to engage directly with the author should do so at the original post.

This fall, world population will reach 7 billion people at a time of accelerated environmental disruption. This article part of a series commissioned by RH Reality Check and with Laurie Mazur as guest editor, to examine the causes and consequences of population and environmental change from various perspectives and the policies and actions needed to both avoid and mitigate the inevitable impacts of these changes.

Here, Lisa Hymas explains how for population and personal reasons she has decided not to have kids. All of the articles in this series can be found here.

Both local and broad scale environmental problems often are linked to population growth, which in turn tends to get blamed on other people: folks in Africa and Asia who have “more kids than they can feed,” immigrants in our own country with their “excessively large families,” even single mothers in the “inner city.”

But actually the population problem is all about me: white, middle-class, American me.

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Steer that blame right over here.

Population isn’t just about counting heads, although by this October we will be counting 7 billion of them worldwide. The impact of humanity on the environment is not determined solely by how many of us are around, but by how much stuff we use and how much room we take up. And as a financially comfortable American, I use a lot of stuff and take up a lot of room. My carbon footprint is more than 200 times bigger than that of an average Ethiopian, more than 12 times bigger than an average Indian’s, and twice as big as an average Brit’s.

Well-meaning people have told me that I’m “just the sort of person who should have kids.” Au contraire. I’m just the sort of person who should not have kids.

When a poor woman in Uganda has another child—too often because she lacks access to family-planning services, economic opportunity, or self-determination—she might dampen her family’s prospects for climbing out of poverty or add to her community’s challenges in providing everyone with clean water and safe food, but she certainly isn’t placing a big burden on the global environment.

When someone like me has a child—watch out, world! Gear, gadgets, gewgaws, bigger house, bigger car, oil from the Mideast, coal from Colombia, Coltan from the Congo, rare earths from China, pesticide-laden cotton from Egypt, genetically modified soy from Brazil. And then when that child has children, wash, rinse, and repeat it all (in hot water, of course). Without even trying, we Americans slurp up resources from every corner of the globe and then spit 99 percent of them back out again as pollution.

Conscientious people try to limit that consumption, of course. I’m one of them. I get around largely by bus and on foot, eat low on the food chain, buy used rather than new, keep the heat low, rein in my gadget lust. But even putting aside my remaining carbon sins (see: airplane flights), the fact is that just by virtue of living in America, enjoying some small portion of its massive material infrastructure, my carbon footprint is at unsustainable levels.

Far and away the biggest contribution I can make to a cleaner environment is to not bring any mini-mes into the world. A 2009 study by statisticians at Oregon State University found that in America the climate impact of having one fewer child is almost 20 times greater than the impact of adopting a series of eco-friendly practices for your entire lifetime, such as driving a hybrid, recycling, using efficient appliances and installing compact fluorescent lights.

And so, for environmental as well as personal reasons, I’ve decided not to have children. I call myself a GINK: green inclinations, no kids.

Most people won’t make the same decision, of course, and I don’t fault them for that. Everyone has different circumstances and will balance their values in different ways. I believe in choice, and that means supporting choices different from my own.

But it needs to become easier for people to make the same decision I have, if they are so inclined.

The reproductive-rights movement focuses on the legal, logistical, and financial hurdles standing between women and control of their fertility. It’s essential work, needed more than ever in today’s hostile political climate.

But the cultural hurdles too often get ignored.

Here in the United States, the Pill has been available for more than 50 years. It’s now almost universally accepted that women will use birth control to delay, space out, or limit childbearing. But there’s not so much acceptance for using birth control to completely skip childbearing. At some point, you’re expected to grow up, pair up, put the Pill off to the side, and produce a couple of kids. Deviate from this scenario and you’ll get weird looks and face awkward conversations with family members, friends, coworkers, and complete strangers.

One 30-something woman I know who works for a reproductive-health NGO says that her colleagues pester her about her decision not to have children, telling her she needs to get started on that family or she’ll regret it. And these are people whose careers are dedicated to making birth control and reproductive health care available to all women! Pro-natal bias runs deep.

Many women who have not already had children find it difficult if not impossible to find a doctor who will perform a tubal ligation. Doctors warn that sterilization is an irreversible, life-altering decision. But having a child is an irreversible, life-altering decision and you don’t find doctors warning women away from that. The broadly held prejudice, in the medical profession and much of the rest of society, is that becoming a parent is the correct and inevitable choice.

Over recent years and decades, it’s become more acceptable for mixed-race couples to have children, and single women, and gay couples, and women over the age of 40, and that’s all good. Acceptance has been slower to come for the decision not to have children. There’s now a fledgling childfree movement, but some who are part of it say they still feel like they’re violating a taboo.

Real reproductive freedom has to include social acceptance of the decision not to reproduce. When we achieve that, it will mean less pressure on women and men who don’t feel called to become parents. It will mean less of a stigma on people who may have wanted to become parents but didn’t get the chance. It will mean a wider array of options for people who haven’t yet decided. It will mean fewer children born to ambivalent or unhappy parents, getting us closer to the goal of “every child a wanted child.”

And, it will mean fewer Americans making a mess of the planet, and a little more breathing room for those of us who are already here or on the way.

I recognize that I am the population problem. I’m trying to be part of the solution.

Let’s make it easier for others to join me.