VOLUME 24, NO. 3 APRIL 2010 SOLARTODAY.ORG
26 Earth Day at 40:
roots of a solar advocate
By Denis Hayes
The organizer of Earth Day 1970 looks at the holiday’s past and future —
and his own.
32 the Future of Freight
By Seth Masia
Rising fuel prices force rapid evolution in cargo transportation.
36 CASE STUDY | Going solar, step By step
By Ed Wansing , with Carly Wansing
Since buying their first home in 2004, Ed and Carly Wansing’s sustainable living
efforts have put them within sight of their net-zero-energy dream.
PHOTO COURTESY OF CRISPIN MATHIAS+FISHER
ON THE COVER: Whether it’s collecting rainwater for the organic
garden, carpooling in their Prius or installing a 2.16-kilowatt photovoltaic system, Ed and Carly Wansing make efforts to live sustainably.
the couple lives in ashland City, tenn., with dogs ally and Penny.
PHOTO COUR TESY OF CRISPIN MATHIAS+FISHER.
Articles appearing in this magazine are indexed in Environmental Periodicals Bibliography and ArchiText Construction Index: afsonl.com.
40 GET STARTED | Will solar Work for You?
By Dan Chiras
Here’s how to calculate the size of a grid-tied photovoltaic system by assessing
your electrical use, your roof and your yard.
next issue: Critical Times for CSP
From pending climate change action to the credit crunch and habitat-pro-tection issues, concentrating solar power is at a pivotal moment. Experts
examine the issues and implications.