Apparently the French are working on their nuclear waste storage facility, they already have a research laboratory constructed about 1/2-km underground. The actual repository will come on line around 2025 and be one of the first to be put into service (only Sweden and Finland likely ahead), and one of the largest planned. The host rock is some kind of limestone layer. [Source: Ontario-geofish. Image: B. Tinoco/ANDRA by way of Nature.com]
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