Final answer:
Without the provided table data, the exact year that uranium mining began in Niger cannot be accurately determined. Uranium mining can generate radioactive waste, potentially leading to environmental contamination and increased cancer risks in nearby communities.
Step-by-step explanation:
Based on the provided information, the most likely year when uranium mining was first done in Niger cannot be determined without the table that shows the number of cancer patients in the Niger mining community between 1958 and 1974. The increase in cancer cases could be correlated to the presence of radioactivity from uranium mining over time. Since uranium mining generates radioactive wastes, an increase in cancer rates in the community might suggest the initiation of mining activities. However, establishing a direct causative link would require more comprehensive epidemiological data.
Uranium mining and uranium mill tailings can lead to environmental contamination and health issues such as cancer due to prolonged exposure to radioactivity. Mining uranium involves high energy consumption and the processes can release radioactive materials. These environmental and health concerns can impact communities living near mining areas for generations.