em • feature by Edie Chang and Steven Cliff California’s Climate Change Edie Chang, MSME, is a deputy executive officer at the California Air Resources Board of the California Environmental Protection Agency in Sacramento, CA. She oversees the Climate Change Program and the Solution Stationary Source Division. E-mail:
[email protected]. An Integrated Model Steven Cliff, Ph.D., is an assistant division chief of the Stationary Source Division. Climate change poses a serious and significant threat to the planet, with dire consequences for the world’s environment, economy, and social welfare. Many of the negative environmental impacts associated with climate change are now increasingly Downtown Los becoming visible in California, including Angeles Aerial reduced snowpack and earlier runoff of California’s trans- portation sources the stored water supply, rising sea levels, contribute nearly and seasonal changes affecting crop 40% of the state’s GHG emissions, and production. This article provides a brief 55% percent of NOX overview of the state’s approach to finding in the San Joaquin Valley and South solutions to climate change. Coast Region. Thus, reducing emissions from transportation would play a critical role in meeting both the state’s midterm air quality goals, as well as its long-term climate targets. Daniel Stein/iStock/Thinkstock 14 em june 2014 awma.org Copyright 2014 Air & Waste Management Association Figure 1. California state- Statewide Emission Trends (tons/day) wide emissions trends. 4,000 Historical Projected 3,500 3,000 VOC 2,500 NOX 2,000 SOX DPM 1,500 PM2.5 Statewide Emissions PM10 (tons/day, annual average) 1,000 500 0 2000 2005 2010 2015 2020 2025 2030 2035 The latest climate science underscores the urgent tremendously, and are projected to continue to need to accelerate greenhouse gas (GHG) emis- decrease in the coming years (see Figure 1).