Increased atmospheric SO₂ detected from changes in leaf physiognomy across the Triassic-Jurassic boundary interval of East Greenland.

There is a highly significant difference in terms of area in most taxa ( Figure 2 ) in the two SO 2 -containing simulated palaeoatmospheric treatments compared to the control, with the leaves in the control generally larger than those in either of the SO 2 -containing treatments.

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