As long as it hasn't been damaged in any way and is taken care of, a microwave can be used for many years - my own parents are using both a standard microwave and a combination microwave/conventional oven that they've owned since 1982.
The main health hazards with microwaves are to people with pacemakers and similar type medical implants - not all microwaves are taken care of the same.
Microwave radiation itself is usually not dangerous to humans (or other living things) except at very high power levels, where it cooks flesh and thus can kill.
Robots can take place of humans in handling dangerous substances
So that humans don't have to do whatever is dangerous. Plus you can always build another of the exact robot. You can't do that with humans.
Robots can help humans in any way! In the home, business, factories, and can do the most dangerous jobs that humans cant even do!
things that are dangerous and out of the way, things that humans can't do
People do not have the physical organs to detect microwaves.
No, microwaves aren't visible to humans. Microwaves are electromagnetic energy, and the only electromagnetic energy humans can see is that of visible light.
Microwaves. Tburn or cook from inside out.
Overexposure to microwaves can lead to cancer.
no I am pretty sure that they are not dangerous to humans
Not normally, but Humans are dangerous to them.
no I am pretty sure that they are not dangerous to humans
oil tankers are dangerous to humans by the pollution of the environment
As a radioactive chemical element, technetium may be dangerous to humans.
Ibex are dangerous to humans.
Is It dangerous for humans to get pregnant? NO!
Only as dangerous as their humans.
When humans threaten them or their cubs.