  We present several applications of the particle camera MX-10 in different
radiation environments, leading to strikingly different observed patterns and
consequently particle composition as well as recorded dose. We describe the
measurements of the radiation background, cosmic muons direction analysis and
the detection of alpha particles in a natural cave. We focus on the analysis of
tracks of highly ionizing particles aboard an airplane and compute the dose
rate with altitude. We also comment briefly on a test in beams of particles at
an accelerator. We discuss the problem of presenting sensitive results on
radiation background levels in various environments to general public. Most of
the experiments presented here were performed and analyzed by high-school
students, confirming the application of the device not only for class-room
demonstrations but also for science projects in physics and IT.
