Defining what is needed to sustain the earth and humanity at the same time is easy?
- Avoid extinction of properly defined species by allowing ownership and breeding. Farming endangered species if needed, keeping them as pets if possible, and creating seed banks and private parks.
- Develop tools to increase the efficiency, productivity and intensity of some natural resource systems so that others can be rested allowing recovery. Intensive crops and hydroponics replacing unproductive peasant farming.
- Develop industries that buy degraded systems, speed its recovery and sell at a profit the improved land or resource. Private parks and Permaculture. [Only in a government monopoly can land become so degraded that it can't be restored. Love Canal was an official government and army waste dump before Hooker Chemical were given federal orders to dump there. "The corporation refused to sell, citing safety concerns, and took members of the school board to the canal and drilled several bore holes to demonstrate that there were toxic chemicals below the surface." Wiki Sale of the site]
- Where viable recycle; where that's not viable, store waste in safe land fill for later mining and recycling. The first profitable landfill mine was in Israel in the 1950's. There are hundreds today.
- Develop a diversity of energy technologies, using fossil fuel to increase the wealth of society and buy time while other energy technologies are matured to cover base load energy and transport.
- Rule no technology out unless it proves truly and indisputably unsafe and uninsurable.
- Farm the seas don't just hunt them blindly. Fertilise, sow and reap for maximised yields. Farmers must own their area of the sea.
- Finally, remember that there are 3 other terrestrial planets, 80 moons and 1 billion asteroids in this solar system. All have resources.
If property rights are allocated properly then it has the same effect as granting rights to the earth itself because in the free market no land or resources has a zero value. When you declare something priceless and strip away property rights you make it worthless and put maintenance in the hands of disinterested bureaucrats who can easily drop the ball and become more concerned about the size of their desk than the species they protect.