Bob loves plants. More specifically, he loves terrariums.
Bob's magnum opus is a large terrarium made from a 5-gallon glass water jug. Inside is a miniature ecosystem: plants grow, detritivores feed on the fallen leaves, larger insects hunt them down, and anything that dies has its constituent nutrients recycled to propagate more life. Nothing enters or leaves the jug, not even air. For our intents and purposes it is the perfect self-sustaining terrarium.
One day Bob wakes up and learns that nuclear war will come in exactly 24 hours. Let's handwave how or why: all that matters is that the 100 most populated US cities will be hit with 10 nukes each, including his home in San Francisco.
Bob is scared for his life. But more importantly, Bob is scared for his terrarium. He mustn't let it die, no matter what.
Lets say Bob has a million dollars to spend and the determination to do whatever it takes to keep his plants alive for at least 1 year. As stated the ecosystem is self-sustaining, but even it has some needs. Bob will have to:
- establish a light source- natural sunlight from a window is a possibility, but he cannot rely on that during a nuclear winter. The ideal alternative is a typical warm white light bulb, which will require power lasting at least the whole year.
- Keep it safe from radiation- I couldn't find much on how much radiation glass or plants can take, so let's just say to keep it as far away from major cities as possible while still fulfilling the first requirement.
Given the above, and that Bob cannot leave the United States for any reason: what is the best thing Bob can do to make sure his terrarium survives a nuclear war? It does not matter whether he lives or dies.