Submission in Support of Petitioners
Case No. CHR-NI-2016-0001
flooding) have impacted food production, but it is not possible to say that these
specific events were caused by climate change (although climate change will
increase the likelihood of such events).92 Climate change is also adversely
impacting the productivity of many fisheries as fish migrate to cooler and deeper
waters in response to warming ocean temperatures.93
In future decades, climate change will adversely impact the production of
major crops (wheat, rice, and maize) in both tropical and temperate regions.94 Even
in the near term, the impacts on global food security could be devastating—for
example, 10% of the projected impacts on food security under a 2C warming
scenario showed yield losses of more than 25% for the period 2030-2049.95 Greater
losses are expected after 2050.96” The food security risk will be greatest in lowlatitude countries, where there is high confidence that crop production will be
“consistently and negatively” affected by climate change in a 2C warming
scenario (and fishery production will also decline).97 In fact, the IPCC has found
that negative yield impacts in the tropics are very likely regardless of adaptation or
emissions scenarios.98 The severity of these impacts will of course increase under
higher emissions scenarios and greater levels of warming.
Agriculture in the Philippines could be “severely affected by temperature
changes coupled with changes in rain regimes and patterns.”99 Historically, crop
yields in the Philippines have declined whenever temperatures have exceeded
certain threshold values, which have been and will be increasingly exceeded as a
result of climate change. 100 Observed decreases in rainfall during the dry seasons
have also led to declines in crop yields over the past few decades.101 Going
forward, the effect of rising temperatures and decreased rainfall on crop production
could be devastating: one study found that 2 degrees of warming would reduce rice
yield in the Philippines by 22%;102 another study found that climate change may
92
Id.
Id. at 493.
94
Id. at 488.
95
Id. at 504.
96
Id. at 488, 504.
97
Id.
98
Id. at 505.
99
PAGASA (2011), supra note 10, at 50.
100
Id.
101
Warren (2009), supra note 17; IFRC (2016), supra note 84.
102
C.R. Escaño & L. V. Buendia, Climate Impact Assessment for Agriculture in the Philippines:
Simulation of Rice Yield Under Climate Change Scenarios, in IMPLICATIONS OF CLIMATE CHANGE FOR
INTERNATIONAL AGRICULTURE: CROP MODELING STUDIES (U.S EPA 1994).
93
Sabin Center for Climate Change Law, Columbia Law School
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