Producing crops that grow in poor conditions
Any time something is of measurable benefit with few or no adverse effects it can be called "useful". Technology has been useful in education for quite a long time now however. So called "super computers" were being used in collegiate education in the late 1960s, giving way to the evolution of spacecraft, computers, home electronics and literally hundreds of the biggest and most profitable companies in existence today. Technology is the future, and keeping children educated on the subject is their only hope for financial and social success, generally speaking. A shorter answer to the question is this: You can say technology is useful in education NOW.
purifying dirty water
preventing disease
it is television media but electronic media is growing so fast so electronic media is going to be the best. Insert mode
The bicycle.
The slums
The slums
Internet would be one of the most useful. Also traditional media such as radio, newspapers, books, magazines and TV is readily available for such purposes.
The slums -apex :)
The sun's energy is most useful to humans after it is converted to electricity or heat energy, which can power homes, businesses, and technology.
Tenements
Tenements(: Apex Learning
There are many degrees that may be useful for pursuing a job in the media. One of the degrees that is most common, for people with media jobs, is a journalism degree.
Producing crops that grow in poor conditions
Engineering is the application of science to solve a problem. Technology is the use of science in an object. An example. Problem: I want to see where i am in the dark. An engineer would use the science of electricity and batteries and existing technology of bulbs. The new technology he/she could develop is a torch.
The term "most advanced technology" created suggests that technology has come to a point in time that no further advances can be made. There are many fields of technology that on a dayly basis anounce breakthrough worth calling the most advaced in that field. The media should be able to tell you the most recent.