2 Peter 3:10 says…
But the day of the Lord will come like a thief, and then the heavens will pass away with a loud noise, and the elements will be dissolved with fire, and the earth and the works that are upon it will be burned up.
The current global warming situation could be too late to stop and we are headed for a runaway-train effect where the earth will heat up out of control. Eventually, this would cause the sea to be vaporized off the face of the earth. Revelation 21 talks about a new earth which no longer has the sea in it:
Then I saw a new heaven and a new earth; for the first heaven and the first earth had passed away, and the sea was no more.
If the elements are burned up as Peter said, this would expose the underlying layer of the earths crust containing the main gold layer deposits. This would mean the new Jerusalem could come down straight on top of the now exposed gold layers of the earths crust meaning the streets of the new Jerusalem would be literally paved with gold:
*The main street of the city was pure gold, as pure as transparent glass. *
The literal translation of “main street” above is “the broad place” …which some suggests means all the vacant space that was not occupied with buildings was of pure gold. The molten gold would solidify into a perfectly flat plane (molton gold, like water, finds its own level) making it as flat and shiny as glass.
Just a thought.