Who owns planet?

So, I'm curious, who exactly owns the planet? Is it a collective effort by all the nations on Earth, or does a single entity or government hold the ultimate say? Are there international treaties and agreements in place that govern the ownership and use of the planet's resources? Or is the concept of ownership even relevant in the grand scheme of things, given the planet's vastness and the complexity of its ecosystems? It's a fascinating question, and I'm eager to hear your thoughts on the matter.