It's déjà vu all over again, with the old guard trying to stop the newcomers...

It's déjà vu all over again, again! Auto dealers have been fighting Tesla Motors on multiple fronts for a while now, trying to either force them to do business with the traditional sales model, or be prohibited from selling in certain states.

No half-done couch here; there's a big place to sit and socialize.

The hot young Swedish firm We Are You came third in a competition to design a new bicycling center in Philadelphia. (They must be really young- entry criteria include only those who graduated later than 2007). Its mission: "to promote bicycling in all

Philadelphia architects Interface Studio are known to TreeHugger for their work with PostGreen and on the 100K house. They have also just completed a modular student residence at Temple University that really does demonstrate

Quoting directly from the Philadelphia Eagles presser: "The Eagles have contracted with Orlando FL-based SolarBlue, a

Paris has the Promenade plantée and New York has The High Line, parks created on top of once-abandoned railway tracks. Now plans are afoot in Philadelphia to transform the Reading Viaduct into what its designers are

A new football stadium in Philadelphia is in the running for the unofficial title of "Greenest Stadium in America."

Open terrace in Kimmel Center was too hot or too noisy; now it's fixed.

A new public space in Philadelphia helps make the city more human-scale and increase quality of life for people who work or pass through the area.

Going for LEED Platinum in an affordable townhouse with clean modern design

Another model for the development industry: Smart young people using their own money

Are solar-powered trash cans a fuel-saving, money-saving way to keep the streets clean? Or are they worse than regular trash cans?

Partnering with a forest conservation non-profit to plant a tree for every watch purchased, Analog Watch Co. creates chic timepieces out of recycled wood.

One more city joins the bike sharing club, providing its citizens with a great, healthy, and green way to get around.

Philly has more than 2X the number of bike commuters per capita of NYC.

The mayor has portrayed the controversial soda tax as a great source of revenue with which to do fabulous things for the city, rather than a benefit for public health.

They are as gutsy and gritty as ever.

The Timber Towers Project seeks to demonstrate the viability of a mass timber high-rise.

A great demonstration of how to develop tiny lots.

There are all kinds of distracted and compromised people in our roads. Some of them cannot help it. So why are phones a problem?

One Passive House architect gives his clients what they want.

But Passive House is so expensive! How can you build housing for the homeless and low income families this way?

Made with a tight budget and schedule, this structure was up and running within a matter of weeks.

This architect converted a shipping container to accommodate an expanding office.

Of all the places to take action on marine litter, this one makes the most sense.

Doug Ford, now leading in the polls, wants to open up more of it for development.

Does it make sense putting this in a small town up on the Canadian Shield?

Architect Jonathan Kearns shows that you can have it all.

Who needs trees when you can have beer in corner stores?

It's being killed the name of "convenience."

220 years ago a lot of people wanted to move to Canada. Here is how they were welcomed.

Pay attention, as this sort of thing could hit other mountainous areas that are dependent on glaciers for their water supply.

Awamaki Lab's fashion-forward collection successfully pairs Peruvian textiles with modern styles.

Peru continues to approve oil and gas projects despite previous exploration leading to the death of half the Nahua tribe.

From ancient trees and strange sea slugs to odd and adorable insects plus more, our most popular reader's photos of the year are a tribute to Mother Nature.

It harms retailers, drives overconsumption, and contributes to traffic jams and pollution. What's the point?

"It's not just about the bees, it's about the survival of humanity"

Pesticides make lawns unplayable.

Why go diagonally when you can go straight up?

And believe it or not, it's environmentally friendly!

When the splendid full moon rises this weekend, she’ll look a bit bigger and brighter than usual.

Nicknamed 'Farout' by the team that discovered it, the celestial object is some 11,160,000,000 miles away.

To cap off a week of black hole fever, the cosmic object has now been named by a language professor in Hawaii.

Scientists think there is a hidden, protected ocean inside of Pluto – and the implications are wild.

The so-called 'transient lunar phenomena' has been stumping scientists for years – but an explanation may be in the works.

Morocco is making good on it's stated goals of increasing renewable energy development, leading towards 40% of electricity from renewables over the next decade.

The Grand Inga dam will be double the size of China's Three Gorges, but big questions remain about whether ordinary Africans will actually get its electricity.

Fresh criticism from Georgian environmentalists adds to the diplomatic tensions created by Turkey's dam-building spree.

A man named Manfred Mornhinweg found the modern world too "noisy and hectic", so he decided to build himself a house on a quiet 40 hectare piece of land in Chile.