BLE client. How to subscribe for multiple notifications?

Yes, this works! It makes sense now when I added it and see the whole code.
Thx a lot @fanoush !
Posting the whole code here so others may benefit from it

  NRF.connect("F5:CB:47:42:E3:BB public").then(function(g) {
    gatt = g;

    return gatt.getPrimaryService("07e1f0e2-b68f-4f­71-8bfc-19b3b0427b68");
  }).then(function(service) {
    return service.getCharacteristic("5d75d722-fce9­-471b-93e2-6c625ef6d634");
  }).then(function(characteristic) {
    characteristic.on('characteristicvaluech­anged', function(temperature) {
      temp = temperature.target.value.buffer;
      temp = (temp[1] * 256 + temp[0]) / 100;
      console.log("Temp: ", temp);
    });
    return characteristic.startNotifications();
  }).then(function(){
    return gatt.getPrimaryService("07e1f0e2-b68f-4f­71-8bfc-19b3b0427b68");
  }).then(function(service) {
    return service.getCharacteristic("5d75d723-fce9­-471b-93e2-6c625ef6d634");
  }).then(function(characteristic) {
     characteristic.on('characteristicvaluech­anged', function(co2) {
      co2 = co2.target.value.buffer;
      co2 = (co2[1] * 256 + co2[0]);
      console.log("co2 : ", co2);
  });
      return characteristic.startNotifications();
  }).then(function() {
    console.log("Done!");
  }).catch(function(e) {
    E.showMessage(e.toString(), "ERROR");
    console.log(e);
  });