Germany has decided to pursue ambitious greenhouse-gas reductions—while closing down its nuclear plants. Can a heavily industrialized country power its economy with wind turbines and solar panels?
IBM has found a new source of revenue: using its mathematicians' formulas in business services.
Twitter plans to become the leader in instant news--and make itself into a sustainable business in the process.
The U.S. stimulus bill includes tens of billions to support energy and information technologies. So why are economists and innovation experts so skeptical?
No one really knows how many people visit websites. A San Francisco startup and Google are both working to change that.
Oil-rich Abu Dhabi is building a green metropolis. Should the rest of the world care?
An Indian startup thinks that the right software can make cheap phones a financial lifeline to hundreds of millions.
We profile some of the most innovative ideas of the Social Web.
Web 2.0--the dream of the user-built, user-centered, user-run Internet--has delivered on just about every promise except profit. Will its most prominent example, social networking, ever make any money?
The philanthropic effort dubbed the $100 Laptop has not met its grand initial goals. But its first deployment, in Peru, may turn skeptics into believers.