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He has what he refers to as a “deep pantry” of supplies, including three months' worth of toilet paper, solar batteries, and a generator.

But trouble with the probe’s solar batteries made it hard at first to figure whether the probe landed in the target zone.

Japan adopted a so-called “green transformation” plan in February that calls for promotion of next-generation solar batteries, offshore wind power and renewed use of nuclear energy.

Lee said that overcast weather caused issues with charging the interceptor’s solar batteries, so in preparation for recent rain, workers ran a gas generator to charge them.

The White House also outlined $110 billion in incentives to create new supply chains and technologies, “like solar batteries, and advanced materials.”