David R Welder holds a B.S. in mechanical engineering from UW-Madison and has worked as an environmental engineer for 40 years, beginning with the Wisconsin DNR Bureau of Air Management, then as an air pollution control expert with Northern States Power (now Xcel Energy). Finally, he served as a senior environmental consultant for Caltha Company, a Minneapolis-based environmental consulting firm, serving individual, commercial and industrial clients throughout the Midwest. David is now a public speaker and author of Forth to Basics: A Guide to Goin’ Off-Grid.
