Back in February, we announced that Renewable Energy World Conference and Expo, North America would be co-locating with Power-Gen International at the end of the year. PGI is the largest trade show for the power generation industry, attracting more than 20,000 executives from around the world to hear the latest information about the politics, economics and advances in the production and supply of power to communities. The show officially starts tomorrow but tech tours and workshops have already begun.