"'The days are coming,' declares the Lord, 'when the reapers will be overtaken by the plowman and the planter by the one treading grapes. New wine will drip from the mountains and flow from all the hills,'" NIV translation
In the new earth and new Jerusalem, the effects of sin are removed. The land will be like it was in the Garden of Eden and will produce a bounty like the world has never seen. This is a sharp contrast to the things that were described earlier concerning the judgment.
"'and I will bring my people Israel back from exile. They will rebuild the ruined cities and live in them. They will plant vineyards and drink their wine; they will make gardens and eat their fruit.'" NIV translation
God's people are called out of the nations as a remnant and inhabit this new earth.
On this new earth, we will be caretakers of what God has created just as it was designed to be in Genesis.
We will work but it will not be a curse like it is today.
"'I will plant Israel in their own land, never again to be uprooted from the land I have given them,' says the Lord your God." NIV translation
This new earth is eternal and there will be no strife between the people that live there. All will be in order as God is universally accepted as the ruler of all men.