This document discusses green information systems (Green IS) and how they can contribute to climate change solutions. It defines Green IS as the development of information systems that provide digital infrastructure for sustainable business processes. Examples include systems that monitor emissions to better manage them, dynamically route vehicles to reduce energy use, and provide consumers information to make green choices. The document advocates for both top-down and bottom-up approaches, and highlights a local community aquaponics garden project supported by modern ICT. Research is presented on how education can shift attitudes from climate change denial to recognizing individual agency to address the problem. The SIGGreen mission and resources for Green IS are outlined.