Solar Technology & Policy

Solar and clean-energy technology, research, markets and policy explainers.

A passenger aircraft representing sustainable aviation fuel

Sustainable Aviation Fuel: What It Is and Where It Fits

Reviewed August 27, 2026. Sustainable aviation fuel is a category with multiple pathways and widely varying lifecycle results. This article does not describe SAF as carbon-neutral or treat every claimed feedstock as equally sustainable. Sustainable aviation fuel, or SAF, is a non-fossil aviation fuel intended to reduce lifecycle greenhouse-gas emissions compared with conventional jet fuel.

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A person in a black shirt and jeans, wearing yellow gloves, is standing on a terracotta tile roof and carefully holding a square solar panel. They are in the process of installing it on the upper-story window of a two-story stucco house.

Solar Windows: How Transparent Solar Technology Works

Reviewed August 2, 2026. Separated research-stage transparent photovoltaics from products a homeowner can commonly buy today. Explore the related ConvertGreen topic hub and read our review methodology. The Dawn of a Transparent Energy Revolution In the quest for sustainable energy solutions, solar windows are emerging as a groundbreaking technology. Imagine windows that not only provide

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Hydrogen power infrastructure with blue pipelines and storage tanks at an energy facility

Hydrogen Transportation: Uses, Limits and Current Outlook

Reviewed August 17, 2026. Rewritten around current U.S. Department of Energy guidance. Outdated vehicle examples, advocacy language, an unrelated affiliate book link and claims that confused tailpipe emissions with full lifecycle emissions were removed. Read our review methodology. Hydrogen can power vehicles through fuel cells, but its value depends heavily on where the hydrogen comes

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