From the world's largest to ones that were here long before the Mayflower, these noble trees are nothing less than U.S. national treasures.

Have you ever gone to the moon and back? Moon trees made the journey — or rather, their seeds did.

Researchers studying fossil clams in Florida believe they found the souvenirs of an ancient meteorite.

There's no better way to enjoy a sky full of shooting stars than to sleep beneath them.

We talk a lot about the devastation of a warming planet, but what if things went the other way? A new study confirms the worst.

Historically we've looked to nature to help forecast the weather; here are some indicators gleaned from generations of folk wisdom.

Here's everything to know about this year's unique September full moon.

After a month under rubble, a nearly lifeless callery pear tree was found by 9/11 workers who were determined to save it.

The mysterious organism looks like a mushroom but acts like an animal, and it's one of my favorite beings ever.

A NASA scientist shows us the three-fifths of the planet's surface that we don't get to see.

In many part of the world, the 2019-2020 winter was the winter that wasn't.

Some might say it's slovenly. I call it cutting down my carbon footprint.

Knowing how to make a few sauces by heart is a skill we all can use.

Here are some tips on reducing the quantity of meat used in recipes.

These simple tricks add the depth and flavor that plant-based vegetable stock can sometimes be missing.

First they cancel the tree planting program in the north. Then this.

It's a lot more than just a box, it's packaging as a service.

My search for the perfect water bottle is over thanks to the beautiful, drinker-friendly, ocean-loving, coral-planting NAECO Bottle.

They show that the struggle is real, and you're not alone.

Consumer demand for meat, soy, palm oil, and more has resulted in 60% of primate species facing extinction.

The Amazon rainforest doesn't need prayers, it needs protectors.

The 530-acre forest has hundreds of ancient giant sequoia, including the fifth-largest tree known on the planet.

Among other things, the data reveals answers about the size of blue whales, the largest organisms to have ever lived on Earth.

Last week, we revealed the winner for our Participate! contest, Vinay Gupta's Hexayurt Project. This week, we are profiling two more great entries, the Participate! runners-up. Yesterday, we showed you easy to assemble, 100 percent recycled plastic

An ambitious scheme to build a number of solar power stations along the Mediterranean shores of the Middle East and northern Africa could generate enough electricity to supply one sixth of the European Union's needs. The generators, individually fitted

We´ve noted in the past plans for new desalination plants in Australia and low-grade energy desalination technology from New Mexico.

Residents of the driest inhabited continent, Australia, have evidently been cottoning onto the fact that water means life and we need to be more thoughtful in our use of this rather precious resource. Since the year 2000, Australians have managed to

With over a third of the world's cranes hard at work building artificial islands, an underwater hotel, and the world's tallest building, biggest mall and most expensive airport, the United Arab Emirates has now turned it attention to building the

There isn't much choice, as groundwater reserves are insufficient. But really...is bottled water any worse than this? Four years behind schedule and nearly $80 million over the original budget, the nation's largest sea water desalination facility

Record droughts, falling water tables and the rapid depletion of aquifers have helped make desalination, a process once considered impractical and too expensive, a viable technology -- at least in some places. As such, there has been a rash of stories --

Bromberg, then a young lawyer working for an environmental NGO in Tel Aviv, was frustrated that environmental issues were not

In part one of this interview, Gidon discussed FoEME's work in promoting cross-border

Images from Prix Pictet World Water Day, celebrated on March 22 every year, is an initiative of the United Nations that recognises that water is a basic requirement for all life. This year's theme: "Shared Water - Shared Opportunities" and "Whether

Dean Kamen is the kind of inventor we don't imagine exists anymore—a fervent polymath like Thomas Edison. Best known as the creator of the Segway, Kamen is also responsible for major breakthroughs in clean energy, water purification, prosthetics,

Droughts and possible water rationing have been in the news recently in California, Israel, Mexico, and Australia. As much of the water used is these regions is for watering gardens and lawns

With his planes, helicopters, and other fuel-hungry pets, Dean Kamen admits that he takes a lot out of the world. This just means that, in keeping with his immigrant grandfather's advice, he has to put more back in. In the second part of our

Having given Global Water Challenge a Best of Green award earlier this year for their innovative work on the issues of drinking water and sanitation, it goes without saying that TreeHugger is a fan of their work.

This simple, innovative solar still purifies water without electricity or filters.

These low-impact, solar-powered desalination units could be a potential boon to water-scarce coastal communities, disaster-prone areas, as well as local marine life.

Using solar stills to purify water isn't a new idea, but it's an effective one. And now new efforts are underway to use this old technology to help green the desert.

A new desalination technology company is looking to help clean up and recover some of the trillion gallons of salty wastewater from the oil and gas industry.

The UAE's clean tech giant plans to have a commerical-scale plant by 2020.

By combining solar PV, solar thermal, and a heat exchanger, Desolenator has developed a low-cost portable water purifier and desalination device powered by renewable energy.

This system could produce 3,500 gallons of clean water per day, at half the cost of current desalination methods, using just the motion of the waves to power the Reverse Osmosis process.

The latest episode of Fully Charged appears to come to us from the future. Or, maybe just Australia...

The iPod of thermostats gets updated with new energy saving features and increased functionality in its mobile apps.

What if the Google Street View car took thermal energy scans of all the country's buildings and then built a database of building energy efficiency information? That's the concept behind startup company Essess's approach to home energy audits.

An ice cream cart uses solar panels to power its refrigeration unit.

A unique solar panel has been designed at Stanford that cools buildings by reflecting sunlight and radiating thermal energy out into space.

The new technology would allow precise control over the transparency of windows and how much light is let in.