Pre-fabricated homes have been around since the early 1900s, hitting their prime around World War II. But they seem to be making a major comeback now, as they produce far less waste and incorporate other green features, such as:

Choosing the Most Eco-Friendly Roofs
The Differences in Green Home Certifications
Choosing a Green Builder
Corporate Sustainability Trends: An Overview (with regards to Bob Dylan)
Energy-Efficient Window Designs
IECC Compliance Guide For Homes Delaware
IECC Compliance Guide For Homes Tennessee
Energy-Efficient Home Design Revitalizes One Community
IECC Compliance Guide For Homes Idaho
Green Home Remodel: Healthy Homes for a Healthy Environment
The Benefits of Residential Solar Power
How to Buy an Energy-Efficient Ground-Source Heat Pump
NREL/Habitat for Humanity Zero Energy Home: A Cold-Climate Case Study for Affordable Zero Energy Homes
Green Home Case Study: Seattle's Studio 24
Ducts in the Attic? What Were They Thinking?
The basics of pre-fab and modular homes
What's New in Eco-Affordable Housing?: Combining Green Building Innovations with Affordable Housing Needs
Smart Home: Green + Wired: Chicago's Greenest Home
Blu Origin
A Factsheet from Austin Energy's Green Building Program: Basic Structural Insulated Panels