On April 15th, France lost part of one of its most iconic buildings — Notre Dame Cathedral. However, fundraising efforts for the rebuild began quickly, and now there are several design firms competing for the job.

France also opened the bidding up to international designers, and that really fanned the flame of the competition. Within the past month, grand design plans have been pouring in, and some of the most interesting ones go beyond historical restoration to directly address one of the world's greatest challenges — climate change.

Hey, the Paris Agreement doesn't have to be the only innovative green initiative in France, right?

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The next time you go grocery shopping, throw about 40% of your food in the trash on your way out.

If that sounds a little ridiculous, you're right — it is. But it also puts the issue of food waste into perspective. In the U.S., that's how much of our food goes uneaten and most of it is sent straight to the landfill.

When you're tossing those wilted veggies into the trash at the end of the week, you may as well be throwing dollar bills in there as well. And that's just the tip of the iceberg lettuce (sorry, I had to). Not only does food waste affect your bottom line — it has an enormous environmental impact, too.

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Liz Mimran was a teenager when she started losing her hair.

This is, obviously, not a common problem for someone so young to have.

"I tried every possible hair care line and supplement on the market [to stop the hair loss], but to no avail," writes Liz in an email. "Worse, some products only aggravated the problem and irritated my scalp."

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Earlier this year, a Swiss startup began removing CO2 from the atmosphere using a large vacuum-like machine.

Their ultimate goal is to start reversing the damaging effects of climate change by reducing CO2 — a major component of atmospheric pollution — on a global scale.

While the machine's development is a huge step forward, one little problem remains — where does all that collected CO2 go?

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