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But this requires huge resources, and we still dont know how it will perform in real-world conditions, outside of strictly conducted clinical trials. Heavy smokers face greater risks Smoking causes approximately 85 percent of all lung cancer cases, only 15 percent of which are diagnosed at an early stage

The parts markings of the MQ-2 Gas Sensor is given below- Like all the other basic sensor modules, this MQ-2 Gas and smoke sensor module has four pins, two of which are for VCC and Gnd and the other two can simultaneously output analog and digital data

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