A1. According to the article, LoRaWAN can...
First, save air quality by IAQ mornitoring. It aims to measure and reduce pollutants indoors. IoT devices require network connectivity to share data so that they can communicate functionally with building owners and operators.
Second, prevent dangerous leaks. LoRaWAN is used to connect the sensors and it opens the possibility of obtaining additional property management sensor data to prevent leaks.
Third, water resource can be conserved. By Smart water metering, it allows municipalities to support a wide range of commercial and citizen-facing applications beyond just water AMI.
A2. Since the technology of IoT is just developing, the security of internets in those 'things' are vulnerable. As a result of searching, IoT service security threats include radio signal disturbance, information leakage, data forgery, and denial of service attacks through IoT device zombieization. I'm afraid the problems of hacking will grow by those threats.
Additionally, in this age when data is important due to weak security, personal information leakage is also feared. Also, as many other parts of daily life are automated, it might lead to unemployment in various unexpected fields.
A3. As 5G network expands, more IoT objects will be linked in anywhere with stronger connection. I look positively at the security and safety that are strengthened by such strong connections. However, security technologies must develop together in line with the speed of data transmission so that there will be no accidents in using them. So security will someday become the most important.
If everything is connected by fast data transmission, I wonder what will be connected next.