The Open Earth Foundation (OEF) has received a grant from the Chainlink Community Grants Program to develop an open-source oracle that measures atmospheric CO2 concentrations, integrating this data into blockchain environments to support hybrid smart contracts in green finance initiatives. This initiative aims to create a robust climate finance and policy ecosystem by providing reliable climate data to a wide range of stakeholders, including decentralized projects, startups, and governmental entities. The project is part of OEF's broader mission to use digital technologies such as blockchain, IoT, and AI to address climate change challenges, in collaboration with organizations like the UN Environmental Programme and Yale University. The Chainlink grant will support the development of an open-source API and Chainlink External Adapters, enabling the integration of CO2 data into blockchain applications for purposes like carbon offsetting and climate reporting. This initiative is expected to empower smart contracts, facilitating more efficient and transparent environmental and economic systems globally.