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Heading back to school inevitably presents dilemmas for those who think about the planet. Consider those horrible fundraising scams where kids sell useless junk (or nutrition-less junk food) and subscriptions to magazines people will never read. Or the mess of fallen soldiers littering the frat house the morning after the homecoming bash.

Two thoughtful students wrote to Umbra in search of solutions. She responded with a veritable symphony of moneymaking possibilities (Sell organic twinkies! Start a Lady Gaga cover band!) and a short Sustainability 101 course for greening up a college campus. (Hint: Get to know the maintenance staff.)

Umbra, for one, believes that children are our future. Teach them well and, well, you know. (Sing it!) Read the full column here.

This year marks the 10th anniversary of our Ask Umbra advice column, and to celebrate, we’re pulling a favorite gem of eco-advice out of the archives each week.

Send your green-living questions to Umbra.

For even more green goodness, you can follow Umbra on Twitter (@AskUmbra) or become a fan on Facebook.