And the evidence shows that for portions of many flights measured carbon dioxide levels are high enough for passengers to notice a ventilation problem.
(portions of many flights; measured; ) (passengers; to notice; a ventilation problem) (the evidence; shows; that for portions of many flights measured carbon dioxide levels are high enough for passengers to notice a ventilation problem) Context(the evidence shows,List([4, 22))):(carbon dioxide levels; are; high enough)
the evidence shows,List([4, 22))
portions of many flights passengers the evidence carbon dioxide levels
measured to notice shows are
a ventilation problem
that for portions of many flights measured carbon dioxide levels are high enough for passengers to notice a ventilation problem
high enough