The Paris Agreement, adopted by the Parties to the United Nations Framework Convention on Climate Change (UNFCCC) in 2015, has now been signed by 197 countries. It entered into force in 2016. The agreement established a process for moving the world toward stabilizing greenhouse gas (GHG) concentrations at a level that would avoid dangerous climate…

The Paris Agreement, adopted by the Parties to the United Nations Framework Convention on Climate Change (UNFCCC) in 2015, has now been signed by 197 countries. It entered into force in 2016. The agreement established a process for moving the world toward stabilizing greenhouse gas (GHG) concentrations at a level that would avoid dangerous climate…

Just read the headlines and weep

Once again, we're proud to partner with the United Nations Environment Programme to help fight food waste and bring attention to World Environment Day.

Did you know that 50% of food produced is wasted? It is true, but thankfully, the United Nations Environment Program and TreeHugger are helping shine a light on this problem with our fourth annual World Environment Day Blogging Competition.

Charles Immanuel Akhimien, a Nigerian doctor and writer, will report from WED host country Mongolia.

In keeping with this year's theme, the USDA and EPA are launching a challenge to reduce food waste at each step from farm to fork.

A round-up of stories addressing the global problem of food waste.

I was fortunate enough to attend the official start of World Environment Day in Ulaanbaatar, Mongolia. Here's why their vision for a sustainable future is so important.

Vote today for your favorite slogan!

Send one of these video bloggers to cover World Environment Day.

Celebrity ambassadors call for support for the UN’s World Environment Day.

The United Nations Environment Programme and goodwill ambassador Don Cheadle have selected a winner. See the video here.

The actor known for The Vampire Diaries and Lost joined today's World Environment Day celebrations in Barbados.

The host country of the United Nations World Environment day is working to protect its natural resources and adapt to climate change.

The UN Environment Program takes aim at unsustainable consumption in 2015.

Design a logo for this year’s World Environment Day and win a trip to Milan, Italy.

In anticipation of World Environment Day on June 5, the United Nations Environment Programme is hosting a blogging competition to raise awareness about this year’s theme of sustainable consumption.

The soccer star arrived in an electric retro-fit Fiat Panda and attended a cooking demonstration.

A certain Commander in Chief says that wildfires are being made 'so much worse by the bad environmental laws.' Here's what's really happening.

Perhaps our perceptions are predicated on the packaging.

Are they good for everyone or just about making money and getting rid of workers?

The extremely dated "It ain't easy being green" title of this Trulia survey actually misinterprets the data; judging by the questions they asked, it is perfectly easy being green; it just ain't cheap.

Image from NASA updated: As many noted, I (idiotically) cited the Montreal Protocol's success here, which has nothing to do with reducing tropospheric ozone -- rather, it has to do with fixing the ozone layer. Thank you commenters, and my apologies for

There's no doubt that geoengineering brings out passionate emotions both pro and con, as recent debate on TreeHugger about the sort of-moratorium on some research coming out of the Convention on Biological Diversity

Another summary of the potential risks and benefits of ocean iron fertilization--the geoengineering method which proposes seeding oceans with iron so as to stimulate microscopic plants that absorb carbon from the

Another report on another geoengineering method that is likely too risky to try and utterly not cost-effective: Injecting aerosols into the atmosphere to slow warming (which would do absolutely nothing about ocean acidification, by the way).

The first field test of injecting sulfate particles into the atmosphere is proposed for New Mexico; ocean iron fertilization experiment shows more promise than previous ones.

Delegates from United Nations member states meet to discuss a global environmental agenda.

The UN Environment Programme kicks off its official celebration of World Environment Day in Milan.

The Eye on Earth Summit aims to harness the power of data and new data gathering technologies to help the environment and support sustainable development.

This week marks Carnival of the Green #205, and it's being hosted by Pragmatic Environmentalism, a blog that explores urban sustainability. Thanks so much to Brenda Pike, who runs the site, for a last minute Carnival round-up. Through her blog, Brenda

A "moot court" will be held over Twitter for the first time ever, and students from 5 major Canadian law schools will argue an environmental law.

Here is someone who gets the message across, in a funny and beautiful way. Australian Stuart McMillen takes topics around environmental sustainability and turns them into catchy cartoons.

Each year thousands of PVC (Polyvinyl Chloride) yoga mats are sold

Sam Suds and the Case of PVC The entire life cycle of PVC is an issue of environmental justice and racism. Many PVC plants are located near poor and communities of color. These facilities have poisoned workers and fence-line neighbors, polluted the

Over at the Sietch Blog, an environmental site that I respect a lot, a roofer named Leo defends PVC roofing as one of the greenest roofs. He isn't wrong; it comes in white, and white roofs are all the rage, it lasts a long time and is a

Our photo of the day comes from northern Illinois.

Corporate Knights Magazine asks the question and gets a different result than we did.

Two weeks ago, fellow Treehugger George Spyros and I had the opportunity to catch a sneak preview of Leonardo Dicaprio's The 11th Hour. Organized by Project Greenhouse, the screening was appropriately held outdoors and under the stars at Marders, an

Last week, California joined Oregon and Washington in signing a pact with British Columbia called the Pacific Coast Action Plan on Climate and Energy, which forms an alliance to set shared fuel standards and mandates for cutting carbon emissions.

For the first time in my lifetime the environment is a top-tier issue in a presidential race, as was clearly in evidence in the Iowa caucuses and the New Hampshire primary. It was next to impossible for a candidate to have any sort of press event

This digitally knitted canopy uses photo-luminescent yarns to create a semi-shaded summer pavilion for visitors to NYC's MoMA PS1 gallery.

All photos credit Collin Dunn Ed. note: 24 of the top teachers in the U.S. have been chosen to go to the Galapagos Islands, with a stop in the Florida Everglades, with the Toyota International Teacher Program. The program is designed to engage a variety

What does it take to get improved environmental coverage in the media?

Grassroots activist honored for 10-year protest against a proposed nickel mine on Mindoro Island

Toxins leached out of old coal mines in the American Rust Belt are converted into custom paints.

A health insurer practices what it preaches.

The world mourns the loss of Berta Cáceres, an Indigenous woman who peacefully yet persistently resisted the destruction of waterways in Honduras for mining projects.