An overview of world electric power grids. Europe, China, India, and US Southwest. The electric power grid allows fossil fuels to be converted to electricity and used in Air Conditioners. By simulating Electric demand in summer supplying power to accumulating Air Conditioners (AC). Causing global warming through spiraling demand for electricity during peak summer periods. AC is being installed in 90% of all new US homes. AC is the second electric use for many homes in developing countries. AC use is now spiralling worldwide and will accelerate global warming.