Sarah Gruen

About Sarah Gruen

Sarah Gruen authored this post when she served as CORE's Community Sustainability Manager (2012-2019). For questions on this and other blogposts, please connect with Lara Whitley, Director of Brand + Creative Strategy, at

Yes, She’s an Energy Warrior

By |2019-12-05T16:05:23-07:00June 11th, 2019|Blog Feed|

Did you know that less than a quarter of all workers employed in energy-efficiency fields are women? Solar companies, utilities, and other facets of the energy industry also report uninspiringly low numbers of female participation.

Today we are celebrating boundary-pushing women who are bucking the trend. Below are five energy warriors who are creating change that matters and generating new possibilities. These female architects, energy-efficiency specialists, and contractors remind us to get up and do something!


The Most Important Election You’ve Never Heard of

By |2020-01-02T16:44:15-07:00May 28th, 2019|Blog Feed|

If you care about clean energy and think utilities are boring, think again. Utilities play a key role in the fight against climate change. As much as 70 percent of Pitkin County’s greenhouse gas emissions are from the energy used in homes and businesses. And at present, 53 percent of the energy provided by the valley’s largest electric utility — Holy Cross Energy — comes from coal. That’s why a utility’s decisions around clean energy and energy efficiency matter.

Luckily, there’s […]

Dear Future Me

By |2019-04-16T14:43:25-06:00April 10th, 2019|Blog Feed|

Our interactive exhibit at the March screening of “The Human Element.” PC: Dan Bayer. 

“What we have to unflinchingly look in the eye is how much choice we still have. The hard part is not wrestling with how bad things could get — it’s understanding how much responsibility we still have to make things better.”

Alex Steffen, writer and futurist

What will you do to make the world a […]

Let CORE Be Your Matchmaker

By |2019-03-11T12:53:45-06:00March 11th, 2019|Blog Feed|

Just as dating apps have changed the dynamic of finding love, CORE is changing the relationship you have with your home. Think of us as your energy matchmaker. We give you tips and set you up with the right contractors so that a comfortable, low-carbon home can be yours. 

One of the hottest technologies on the market is the cold-climate, air-source heat pump. It’ s a sleek, easy-to-install heating and cooling system that puts us all on […]

Use Cold Air to Heat Your Home? You Bet.

By |2019-04-04T10:01:10-06:00February 8th, 2019|Blog Feed|

Can you use cold air to heat your home? You bet. Just ask a Swede. In Sweden, a legit cold climate, they’re staying toasty with heat pumps. Unlike other heating systems, heat pumps don’t generate heat to keep your home cozy and warm — they take heat from the air. Recent advances mean this technology is now burning a hot path into cold-climate homes in the US.

Heat pumps warm a home by transferring heat from the outside […]

The Home of the Future is Electric

By |2020-01-02T16:44:58-07:00January 10th, 2019|Blog Feed|

We know that our fossil fuel addiction is destabilizing the climate. And yet, in much of our daily lives—from showering to sautéing—it’s been difficult to find a viable alternative, so we continue to emit greenhouse gas (GHG) emissions. That’s all changing: electricity is getting cleaner, creating a clear path to a fossil-free future.

What if everything ran on gasoline? This Nissan Leaf commercial has electricity looking better and better.


Don’t be a Turkey: How to Talk Climate This Thanksgiving

By |2018-11-09T10:53:24-07:00November 1st, 2018|Blog Feed, Uncategorized|

Over 27 million Americans (65% of the population) rarely — if ever — talk about climate change.*  This jaw-dropping number of people choose not to mention climate, when it is impossible for me not to talk about it. I talk about it over margs with friends and over cake at my cousin’s wedding; I also let my senators know what I think they should do about it.

Say Hello to Our Energy Pioneers

By |2018-10-29T12:19:04-06:00October 11th, 2018|Blog Feed|

CORE’s Executive Director, Mona Newton, welcomes the 2018 TRUE Pioneers grantees during the annual reception held in the blue twilight of dusk, at the Roaring Fork Conservancy’s River Center, a 2017 grant winner.

We’ve got to do more and we have to do it fast, according the newest Intergovernmental Panel on Climate Change report put together by the world’s best climate scientists. That’s why we’re proud to present the recipients of the Randy Udall Energy […]

Faces of Energy Efficiency

By |2018-10-30T11:42:29-06:00September 12th, 2018|Blog Feed|

We hear about the role that oil and natural gas production play in Colorado’s economy all the time. But what if I told you energy efficiency — not oil and gas — is the No. 1 creator of energy jobs across the Southwest?

A net of 67,000 jobs were added to the energy efficiency sector last year — beating out new jobs in oil and natural gas production, electric power generation and other energy industries, according […]

How The RFV Keeps the Lights On

By |2018-09-17T15:54:19-06:00September 12th, 2018|Blog Feed|

We’ve got a long list of ways you can use less energy, but a 72-hour power outage doesn’t make the cut. A blackout of that scale was a real threat during the early days of the Lake Christine Fire. Crews from Holy Cross Energy and Xcel Energy, two of the electric utilities serving our region, were working hard to keep the power flowing. The fire may be contained, but the utilities are still working around-the-clock to recover from the […]