The continued extreme use of fossil fuels to meet world energy needs is putting the Earth at risk for significant climate change. In an uncontrolled experiment, the buildup of carbon dioxide and other greenhouse gases is apparently affecting the Earth's climate. The global climate is warming and severe storms such as hurricanes and tornadoes seem to be getting worse. Alternatives to fossil fuels may reduce the addition of carbon dioxide to the atmosphere. Space Solar Power, from orbiting satellites, provides an option for clean, renewable energy that will reduce the pressure on the Earth's environmental system. Uncertainty in the cost of commercial power from space has been the principal issue inhibiting investment support by the power companies. The Thunderstorm Solar Power Satellite (TSPS) is a concept for interacting with thunderstorms to prevent formation of tornadoes. The TSPS can develop and demonstrate the technology and operations critical to understanding the cost of space solar power. TSPS benefits are saving lives and reducing property. These benefits are not as sensitive to the system economics as the commercial solar power satellite and can be used to justify government investment in space solar power. Consequently, there is no direct competition with fossil fuel based power supplies until SSP technology and operations have been demonstrated. Before weather modification can be safely attempted, the fine structure of thunderstorms must be simulated and related to tornadogenesis