DescriptionOil shale mining in Estonia in 2016-2019.png
English: Annual amount of mined oil shale in Estonia (millions of metric tonnes from 1916 to 2019. Sources: John R. Dyni in Survey of energy resources (22 ed.) by World Energy Council; Statistical Office of Estonia; Estonian Oil Shale Industry Yearbook 2018, 2019)
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.