Update README

Author: lloesche

README.md

@@ -2,3 +2,5 @@
 Public Resoto Data
 
 Location data is open data, licensed under the [Open Data Commons Open Database License (ODbL)](https://opendatacommons.org/licenses/odbl/) by the [OpenStreetMap Foundation (OSMF)](https://wiki.osmfoundation.org/wiki/Main_Page).
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+Carbon Emissions data is open source, licensed under the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0) by [Cloud Carbon Footprint](https://www.cloudcarbonfootprint.org/).