Altren's president Charles Lazin
lectures on Alternative Energies and GeoExchange systems:

2007
- February 18, 2-3:30 PM Mohonk Preserve

2006
- June 2006, Clearwater Festival, Croton Point Park, NY
- May 20, Rosendale Energy Expo 2006, Rosendale NY ( see the flyer )
- April 19, Dutchess County Community College, Poughkeepsie, NY
- February 18, 2-3:30 PM Mohonk Preserve

2005
- November 2005, Cragsmore Public Library
- June 2005, Clearwater Festival, Croton Point Park
- April 2005, Rosendale Green Building & Renewable Energy Expo

2004
- December 2004, Dutchess County Community College
- October 2004, Center for Hudson Valley Sustainable Living Communities Networks
- June 2004, Clearwater Festival, Croton Point Park NY
- May 2004, at Sierra Club Atlantic Chapter Mid Hudson Valley, Poughkeepsie
- May 2004, at the IBM Poughkeepsie Environmental Awareness Day Event
- April 2004, at the Marist College, Poughkeepsie
- April 2004, Hudson Valley Technology and Commerce group in Woodstock

List of Articles:
- Upstate House, July 2005
- Catskill Mountain Region GUIDE, June 2005
- Chronogram, May 2005
- Hudson Valley Green Times, Kick the Fossil Fuel Heating Habit for Good
- Upstate House, December 2003