Carbon dioxide: The observed atmospheric concentration is 30% above preindustrial levels as determined from air trapped in ice cores and direct measurements, and the level continues to increase.
(The observed atmospheric concentration; is; 30% above preindustrial levels) (air; trapped; in ice cores and direct measurements) (the level; continues; ) (the level; to increase; )
The observed atmospheric concentration air the level the level
is trapped continues to increase
30% above preindustrial levels
in ice cores and direct measurements