What is the relationship between ukrainian history and geography?

Ukrainian was known as Kievan Rus up until the 16th century. in the 9th century kiev was the mayor political and cultural center in eastern of europe.

After the Russian revolution, Ukrainian declared its independence from Russian on jan 28, 1918 and several years of warfare ensued with several groups.  it was one the most devastated soviet republic after the world war II.

The nation's nuclear power plant at chernobyl was the site of the world's worst nuclear accident on Oct 29 1991. this is the relationship between Ukrainian history and geography.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.