3️⃣ After ~300 years, the harmful radiation diminishes. Therefore, we store it in deep geological repositories. Finland's repository, Onkalo, is a notable example, with negligible environmental impact.
The 'waste problem' doesn't even require a solution; it's not a problem at all.
And remember: Are you actively advocating for saving the planet? Excellent idea! Construct more nuclear power plants. The more, the faster, the better.
This isn't an opinion; it's science.