These researchers used science to make laundry packs a new way.

They want you to have clean clothes. And to make the world a better place.

For the last nine years, Kay Gebhardt has had a demanding and often unsung (at least publicly) job.

If you've ever tried to get grass stains out of your kid's jeans or little dots of salad dressing out of a treasured silk blouse, you were probably concerned about whether they'd come out — but did you give much thought to the safety of the detergent you were washing your clothes in?

Kay's given it a lot of thought.

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Bad news, folks. Your house? It's kinda dirty.

But you're not alone. The world is a dirty place, and every time we step into it, we bring home morsels of its muck.

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Seventh Generation

You may have heard of the Dirty Dozen — 12 chemicals that activists have identified as potentially harmful that we regularly come in contact with in our home, health, and beauty products.

Over the past decade, a lot of science and research has gone into figuring out the long- and short-term health effects of products we use in our homes and on our bodies. The jury is still out on most of them, but some of the findings are worth a closer look.

In 2010, Canada's David Suzuki Foundation did a study on the 12 chemicals and compounds they felt consumers should try to avoid. Since the study was published, some governments have banned some of the chemicals and some companies are reformulating their products so they don't contain them.

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