There is a need to transform environmental data into Trusted Decision Ready Information and make it available throughout European Data Spaces. The CitiObs released a policy brief presenting a solution using the principles of immutable and discoverable assets, in a truly distributed environment that is technologically neutral, that requires minimum modifications in current systems, does not require duplication of assets, and retains the producer data sovereignty The policy brief has been published at: CitiObs_Policy_Brief_Trusted_Data_European_Data_Spaces.pdf.