Trivia challenge: how many years can you run London with the power used on Christmas lights?

An island once home to a Renault car factory will be sustainably transformed. We also have a Christmas tree powered by jumping elves, a hydrogen-powered tractor, and more.

This Christmas tree by Giles Miller will keep on going, year after year.

A tree-planting campaign that's as easy as a click, text or tweet seeks to reach a million before December 31.

Around the country, Christmas trees are recycled for an unlikely purpose: they make for good fish habitat.

Created by Argentine designer José Manuel Rebert Alarcon, the sleek alternative to a dead tree allows other uses during the year.

Why should Fox News have all the fun?

An old boat and nets are recycled into a lovely surprise.

We've done them all - the organic Xmas tree, the re-plant live Xmas tree, the bike-delivered Xmas tree. This one feels the greenest of them all.

Instead of buying a cut tree that gets used once, choosing a potted or burlap-bagged living Christmas tree can yield years of enjoyment.

When it comes to live Christmas trees, we're still feeling the effects of the Great Recession ten years ago.

Every year, the town of Barrydale makes a magnificent tree using upcycled plastic, ribbons, and interactive lighting.

The e-behemoth has just announced (IN SEPTEMBER) that it will be selling and shipping 7-foot trees this year. Here are the problems with that plan.

Pot-grown trees are a nice idea. Especially if someone else looks after them.

From supporting local farmers to boosting happiness, there are many reasons to use a real conifer in your house.

A few households have had surprising visitors.

After reading an article that recommended spending $1,300 on 'must-have' beach gear, it's time a serious talk about what's necessary and what's not.

This dismal finding shows that our eating culture needs a serious overhaul.

Juniper is an invasive species that's tough to work with.

It's a problem when nobody wants to touch anything.

It would be nice to hang out in one of these right now.

Maybe, but we need balconies done right.

We are definitely not going back to the way we were.

Why now, more than ever, all new building should be Passive House.

It's Loyalty Day in America, but International Workers Day in much of the world. That's what we should celebrating right now.

Just using them for an hour pushes pollution above legal limits.

Serious cooks are serious about gas, but it's time to give it up.

Looking at how one firm, Bergmeyer, is returning to work raises some questions.

There are some ideas that come around again with every economic crisis.

Toronto project pushes every TreeHugger button

The age of diesel and petrol cars is ending. It’s time to do the same for fossil fuel heating.

Especially when civility is in tatters, why do we feel the need to judge little things that bring others joy?

Compact but comfortable, this small home features clever small space design ideas and uses coffee grounds as fuel.

Check out an insulated stainless steel mug for free, as you would a library book.

Why design fancy cups that work like disposables? Just sit down and smell the coffee.

Talk about creative and adaptive reuse!

Does this make any sense, and is it truly circular?

The Washington Post has proposed the worst idea I've heard in a while.

Most wild coffee species are at risk for extinction.

Every year, people go crazy buying coffee and tossing the cups, in hopes of winning a prize. It's a ludicrously antiquated model.

This curious concoction has been engineered to have all of coffee's fabulous flavor, minus the bitterness.

That's what they are doing in Berkeley, and it will spread.

This could be the key to getting people to carry reusable mugs each day.

No more than six cups, new research says.

Travellers can take a reusable cup and drop it off at a 'cup check-in point' before boarding a flight.

A curious Norwegian initiative is connecting people in coffee shops who want to chat.

There is more money in it for the Convenience Industrial Complex.

But you'd better return it within 5 days or else you'll get fined.

Reusable mugs aren't everything.

Realizing that recycling isn't working, the chain will be eliminating single-use cups and coffee bags.