Colorado

Geothermal

Denver has a plan to heat and cool buildings with — wait for it — sewage

Denver’s largest source of emissions is its buildings, which tend to run on fossil fuels. The city is turning to a surprising solution to kick the habit.

By Ishan Thakore .

25 May 2026

City skyline — Denver has plans for a thermal energy network to help decarbonize its downtown core. (AAron Ontiveroz/The Denver Post via Getty Images)

Geothermal

Geothermal energy gets boost from new coalition of Western governors

Arizona, Colorado, New Mexico, and Utah are joining forces to accelerate deployment of clean, around-the-clock geothermal energy in the region.

By Maria Gallucci . 21 May 2026
Geothermal

An oil company quietly dug a surprisingly deep geothermal well

Oxy drilled four miles down in Colorado, and did so quickly — a promising development for the geothermal industry.

By Sam Brasch . 5 March 2026
Heat pumps

Zero Homes nabs $16.8M to go big on easier heat pump installation

The Denver-based startup’s software eliminates the usual in-person home visit to quote a heat pump project, saving customers time and money.

By Alison F. Takemura . 19 February 2026
Fossil fuels

Colorado co-ops to Trump: Let us close our aging coal plant

Tri-State and Platte River become the first utilities to challenge Trump’s emergency stay-open orders for coal plants, citing the cost to customers.

By Jeff St. John . 3 February 2026
Heat pumps

Colorado group looks to boost heat pumps with $200M federal grant

It’s a rare example of a Biden-era climate grant moving forward under Trump — and could grow heat pump adoption across the Denver area.

By Alison F. Takemura . 2 February 2026
Geothermal

Why this Colorado coal town is digging geothermal

Hayden is tapping renewable thermal energy to affordably heat and cool its new business park — and entice companies looking to reduce energy costs.

By Alison F. Takemura . 15 December 2025
Utilities

Colorado mandates ambitious emissions cuts for its gas utilities

Resisting industry pressure, regulators ordered a 41% emissions reduction by 2035 — a move that supports Colorado’s climate goals and could guide other states.

By Alison F. Takemura . 2 December 2025
Fossil fuels

Trump’s DOE may soon force more coal plants to stay open

Colorado coal plants are likely to face DOE orders to keep running past planned closure dates, even as the costs of keeping an old Michigan plant open pile up.

By Jeff St. John . 12 November 2025
Geothermal

Meet the coal miner who just started a geothermal drilling business

A Colorado entrepreneur is going all in on a renewable energy source that will keep him digging — and could be a model for other miners looking beyond coal.

By Alison F. Takemura . 30 October 2025
Green steel

Electra announces deals with Meta, Nucor to scale its clean iron tech

The Colorado-based startup unveiled its new demo plant and announced agreements with major steel users. The facility could start churning out clean iron by mid-2026.

By Maria Gallucci . 21 October 2025