CIO Jeff Saper drives a hybrid car, favors service providers that use alternative energy and has launched many green IT initiatives at his strategic communications firm, Robinson Lerer & Montgomery LLC in New York. But he’s also concerned about a type of pollution that even Al Gore has yet to tackle: digital pollution.

The recent growth of information sources such as blogs, social networks, news aggregators, microblogs like Twitter, instant messaging and e-mail has been exponential. And with broadband penetration among active Internet users expected to break 90% this year, according to Internet marketing firm Website Optimization LLC, there aren’t many people today who haven’t experienced some form of information overload.