“…In 2006, the proposition that plants may act as a source of aerobic CH 4 emissions, and that these emissions could increase with both light and temperature (Keppler et al ), generated significant controversy within the scientific community. It was originally met with skepticism (Dueck et al , Beerling et al , Wang et al ); but while the mechanism remains unknown, evidence has been mounting in support of this finding, with compounds such as biopolymers as potential precursors (Cao et al , Keppler et al , McLeod et al , Vigano et al , , Wang et al 2008, 2011a, 2011b, Brüggermann et al , Bruhn et al , , Messenger et al , Qaderi and Reid , , , Althoff et al , Wishkerman et al , Watanabe et al , Zhang et al , Fraser et al , Liu et al ). These studies suggest that the global CH 4 budget may be more complicated than originally anticipated.…”