The neuron that have sensory receptors is afferent Neurons
That depends on whats wrong with your lungs.
The issue of whether human activities cause global climate change is indeed a controversial topic. The limitation to climate research that could be overcome through scientific design is "Data from a wide range of time periods must be analyzed." Very powerful, or Super Computers, are required to analyze large amounts of data. The sooner more powerful computers are developed, the sooner data from the wide range of time periods can be analyzed. This will give scientists a better idea of the extent of global warming, if any, and how to prevent it.
The best way to get accurate information on the risks of a new health-enhancing activity is to consult someone who is informed and experienced in that activity and it is a good idea to consult your doctor about the activity before participating in it to make sure you are physically capable of doing so.