Which location is an area of nuclear bomb testing that is high and environmental contamination and home to polar bears that are genetically distinct from other polar bear ubpopulations?

Novaya Zemlya.

Explanation:

Novaya Zemlya is located in an archipelago in the Russian Arctic, consisting of several small islands and two main ones; Séverny Island and Yuzhny Island. A nuclear testing site was established in 1954 that remained active until 1990. It is considered that at least 224 nuclear tests were carried out and the most powerful hydrogen bomb ever launched was tested there; The Tsar Bomb.

Due to these experiments the local fauna, such as the polar bear and the arctic fox, has been affected by radioactivity and its genes have mutated.

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the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.