I believe it would be milestones
It was important because it supported the Hanseatic trade route in the Baltik and the canal needed to be built between major trading cities. This was one of the great examples of co operation across borders in the North Europe in the area of free trade.
Pollutants is the general term.
Chemical pollutants. Waste pollutants. Chlorofluorocarbons
Law of the Twelve Tables
Rome's laws that were written on 12 bronze tablets! Written down to protect people's rights so that everyone knew what the laws were.
"The best known ancient code is the Babylonian Code of Hammurabi. The Romans began keeping legal records, such as the Law of the Twelve Tables (451–450 bc), but there was no major codification of Roman law until the Code of Justinian (ad 529–565), which was compiled long after the dissolution of the Western Empire."
1 is laws based on the quran
2 is ethnic group
