Update README.md

Co-authored-by: Johannes Gütschow <mail@johannes-guetschow.de>

README.md

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 # Global CO2 from Cement Production Dataset
 
 This repository downloads the Andrew dataset on global CO2 emissions from cement production from [Zenodo](https://zenodo.org/records/10008931).
+The dataset is converted to the PRIMAP2 format and provided in the csv based interchange format and the netCDF based native primap2 format. Several version of the dataset are available.
 
 ## Description