Students need clean air in classrooms
Use of information technology in schools means having many computer terminals in classrooms, and this trend looks set to continue.
But each computer terminal is like an engine's exhaust pipe, sending choking particles into the classroom, contaminating the environment.
I agree with Stephen Clynes ("Put purifiers in classrooms to clean air", June 17) that we need to install purifiers or strong air exchange systems to protect our teachers and students.
Pang Chi-ming, Fanling
Pang Chi Ming is a moron. This is, almost certainly, the stupidest letter I have seen in the SCMP. And there is fierce competition from the rag-tag band of racist whiners, Climate change deniers, the China First brigade, and the Thatcherite Loons.
Firstly, there have not been computer terminals in classrooms for about 40 years. A computer terminal is a very specific use of technology: a relatively simple computer connected by some network link to a central server handling all of the computational activities. An example would be sort of thin client you see in an estate agents office. A Windows PC or Mac, or even an iPad or other tablet is far more sophisticated than that, these days.
Secondly, to think that each computer is like an engine's exhaust pipe emitting pollutants, is to demonstrate a complete misunderstanding of what a modern CPU is, how it's powered, and what it does. There are no emissions, apart from slightly warmer air. There are no particles, save those displayed on the screen. There is no contamination, save of the intellectual variety.
