A California study examines what it will take to encourage residents — and builders — to adopt heat pump appliances.

More than three dozen states have taken sides in a court fight over the EPA's reinstatement of California's strict tailpipe emissions standards.

A New Jersey bill designed to help solar developers who say that delays are threatening the viability of projects has raised concerns about ratepayers'costs

Thirty parties submitted comments to the California PUC on a controversial rooftop solar net-metering decision that the commission is revisiting.

Supporters of a bill to increase the Rhode Island Renewable Energy Standard to 100% by 2033 expect Gov. Dan McKee to sign it into law.

New Jersey is slowly focusing on how to stimulate development to handle its ambitious offshore wind, solar and electric vehicle policies.

Washington is bringing on a full-time epidemiologist to study the impact of climate change on human health.

The developer of a renewable diesel fuel plant in Oregon is tackling its final 2 bureaucratic hurdles before beginning construction on the $2 billion facility.

California regulators are fine-tuning a set of draft rules that would transition the state to 100% light-duty ZEV sales by 2035.

Three owners of urban forests in Washington have sold more than $1 million in carbon credits to preserve those lands.