Moreover,
with mounting evidence that crop yield improvements from CO2
fertilization may not be as great as previously expected (Long et al.,
2005) and that O3 pollution may more than offset even significant
crop yield gains due to climate change in some regions (Reilly et al.,
2007), surface O3 abatement provides a critical opportunity to
increase supplies of food and fuel without further environmental
degradation. Because tropospheric ozone is a potent greenhouse
gas in addition to a noxious air pollutant (Forster et al., 2007), O3
reductions would also provide numerous co-benefits to climate and
human health