There are many sites that utilized Yahoo! Search BOSS and successfully built their own vertical search engines. For the green search engine, the typical example is Truevert. And despite the fact that Truevert search engine is powered by Yahoo!, but it uses its own proprietary, patent-pending technology to select and rank the results it gets from YAHOO! instead of render the generic YAHOO! green results.

Basically, green issues are hot right now. For those who want to search the green stuff for the good of the planet, Truevert has a simple interface that includes search function in addition to the recent green news which are all pulled from the popular green Web sites.

To know more about Truevert, I’ve embedded a visual presentation about this green search engine. Enjoy.

Truevert Vertical Semantic Search

View more documents from Truevert.

Greenseng is not just a search engine. It describes itself in which it is different from any other ordinary search engine, but a search engine that goes green. Perhaps you’ll ask, “Do we really need a green search engine?” To promote a green lifestyle while we conducting search on the Web from a green point of view, we do really need a green search engine.

In fact, Greenseng was powered by CO2Stats, a company that helps in making Web sites green. CO2Stats was owned by Enernetics, Inc. and Enernetics was a company that co-founded by Alex Wissner-Gross and Timothy M. Sullivan in October 2007, a Y Combinator-funded technology firm. Its strongest appeal for the users is that it is a green certified site since it is powered by CO2Stats, and while users using Greenseng in searching on the Web, it will helps them to offset the carbon emissions through CO2Stats.

When you’re conducting search on Greenseng, the search results are powered by Google search, and at the bottom of every page, there’s a small and tiny Green Certified Site logo that will list the total CO2 emissions of your search.

Although Greenseng is only covered the Web search at this moment, I’m glad to see that it is a good solution for Internet users for minimizing the global warming effect when searching on the Web. As a result, when using it more and more, we’re ensure that we’ll live in a more greener lifestyle.