DECA is designing a decentralized crypto climate fund protocol collateralized by carbon credits and a cryptographic algorithm to reduce the climate change finance gap. The climate fund will be community based and managed by a Decentralized Autonomous Organization (DAO) which aims to finance projects with social and environmental impact using different mechanisms. This includes mainly a carbon credit bridge, minting and redeeming, and a project finance. The protocol makes use of two different tokens and carbon credits, DECA 2.0 which is pegged to a certain degree to the carbon credit value measured in co2 and a tco2 token which represents the quantity of carbon credits integrated into the DECA Ecosystem. The carbon credits are used as collateral and support the DECA ecosystem.