How safe are microwaves and solar power from space?

The realization of the solar power satellite (SPS) concept holds great promise for solving energy crises and improving the lot of mankind. However, it is increasingly clear that the development of SPS systems with microwave power transmission (MPT), along with the resolution of environmental issues, will be a global endeavor. It is also clear that the increasingly global economy means that sources of key components for advanced technology, with low-cost manufacturing, are outside the United States and, indeed, often in the underdeveloped parts of the world. The activities of ICES and the IEEE become very relevant in achieving the goal of rational, international safe exposure standards, as well as international consensus on regulation of RFI, such as through the (CISPR/IEC).