Energy Efficiency

A new report reveals heat pump sales rose 15 percent worldwide in 2021 and are doubling year on year in some markets.

Plus, eight ways to make sure that retrofit programs are as comprehensive as possible for customers.

"Electrify everything" is a defining goal in campaigns to rebuild infrastructure around clean fuels. What's the resistance?

The owners spent two years tightening building envelopes, replacing heating and cooling systems, and installing rooftop solar panels. Now, they hope to replicate the success elsewhere.

Focusing on the climate pollutions from big cities keeps us blind to the energy burden in low-income communities.

How telecommunications can impact the environmental and economical sustainability of aviation.

These five areas of grid and clean energy investments are receiving $1.2 Trillion in funding for everything from battery R&D to transmission lines to residential energy costs.

Collectively, the work of 25 cities in the Climate Challenge will reduce CO2 emissions by 74 million metric tons from 2020 through 2030, compared to business as usual.

Where can we significantly reduce GHG emissions? Where do we get the best GHG reduction bang for our buck?

By integrating energy efficiency, distributed energy generation technologies and demand flexibility into its buildings, the federal government can help to advance the state of the art.