In order to mend the environmental issues in Eastern Europe, the Government must take steps to create mindfulness in the general public regarding the environmental concerns. Water pollution is considered to be the major factor of environmental concern in Eastern Europe.
Development of international policy would also pacify the concern as the Government may seek aid and assistance from other countries. The Government can collect data and enforce policies that safeguard the environmental resources from getting washed-out or damaged.
Danube River is considered to be important for Eastern Europe because it connects the Eastern Europe and Central Europe. Since 1800, this river route is used for trade and transportation.
indigenous
* indigenous basically just means people who originate in a place- natives.
The expansion of railroads created more ways for things such as general goods to be shipped elsewhere to buyers or companies. (Hope this helps a bit, sorry for such a short answer.)
Before Korean war
The Vietnam were divided in two nations in 1954 to 1975 and the Korean war was 1950 to 1953