Hydrogen made from waste: is it green or is it red?

Green hydrogen refers to hydrogen produced through electrolysis,  powered by renewable energy sources such as solar and wind. The term is sometimes conflated with so-called “waste-to-hydrogen,” however, when there’s nothing green about burning waste to produce hydrogen. This advocacy brief gives an overview of what “waste-to-hydrogen” is and why it is problematic in terms of greenhouse gas emissions, toxic byproducts, and energy and material efficiency.