Thanks to an emerging wireless technology known as WiMax, students at the Instituto Agropecuario de Monte in Buenos Aires, Argentina, now can use the internet for research in their classrooms--and from locations in the countryside several miles away.

This rural agricultural school--90 miles outside the Argentine capital--is one of the first active test sites for WiMax, a wireless broadband technology that reportedly can broadcast a wireless internet signal over several miles without needing a clear line of sight. Proponents of the technology say it will be instrumental in helping communities realize their vision of ubiquitous wireless connectivity--but...

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