Ever wondered how good the air quality is in your living room? Or do you  need proof of why you fall asleep in a non-ventilated meeting room  after 3 hours? Look no further! This DIY experimental kit has all the  answers!  The Earth Listener is an Arduino based sensor device that reads multiple  environmental values to indicate the air quality. This kit is assembled  in 15 minutes and you don't need a soldering iron! Just connect the  parts and wires, put everything in the case and connect it to a 5V USB  socket. The Mega development board is pre-programmed and shows eCO2,  TVOC (particles in the air), barometric pressure, temperature and  humidity values onto the TFT touchscreen. To top thing off, the Earth  Listener also contains a lightning detection sensor. If lightning (or  electronic discharge) is detected, the Earth Listener will give an alarm  tone and log how far the lightning is located. Since everything is open  source, you can add an additional 6 sensors to the Earth Listener via  the sensor shield. Logging is possible via the micro SD card (not  included).