As you observe mr. fenske, you recall that chronic obstructive pulmonary disease (copd) is generally characterized by progressive reduction in bronchial airflow. the underlying pathophysiology may involve:

Asthma is a common chronic disorder of the airways that involves a complex interaction of airflow obstruction, bronchial hyperresponsiveness and an underlying inflammation. ... Acute symptoms of asthma usually arise from bronchospasm and require ... Treatment directed toward reducing inflammation can reduce airway .

The answer is observations and interpreting.

Ecological footprint is determined by measuring carbon dioxide emissions for a given region.