 On March 1st of 2023, Tesla had the investor-day presentation. In the first 30 minutes of the presentation, Elon Musk talked about his vision for the Earth's energy future. Elon's vision includes the following. It does not require destroying natural habitats nor requires us to be austere. A typical gasoline car today converts less than 30% of energy in gasoline into motion. We need only half of the energy in an electric economy versus a combustion economy because of higher efficiency. We will require 6 to 10 trillion dollars of capital investments, which will be about 1% of global economy in the next 10 years or half a percent over 20 years. We will need less than 0.2% of the land area of Earth to harvest the needed wind power and solar power, which should recycle the batteries. A major takeaway for me is that there will be 6 to 10 trillion dollars of capital investments in the next 10 to 20 years.