The most ironic thing to ever happen must be the trees that were cut down to make copies of Dr.Sues's The Lorax.

Irony
The most ironic thing to ever happen must be the trees that were cut down to make copies of Dr.Sues's The Lorax.
The most ironic thing to ever happen must be the trees that were cut down to make copies of Dr.Sues's The Lorax.