We closely monitor our emissions and are continuously looking for ways to reduce these emissions and have a long-standing commitment to emission reduction.
In 2016, we saw a slight increase in our GHG emissions by 2.4% compared to 2015 and 1.3% on an intensity basis. While the year-over-year results are up, we have realized 32% of our goal to reduce our GHG emissions intensity from our base year emissions.
Similarly, our SO2 emissions intensity increased in 2016 by 4.9%. While we are up year-over-year, we see an overall downward trend, and we have realized approximately 20.2% of our goal to achieve a 40% reduction of SO2 emissions intensity by 2025. While the year-over-year variations are driven by feedstock mix, we continue our efforts to reduce our environmental footprint.
In 2016, our NOX emissions intensity decreased by 3.3%, with an overall emissions reduction of 2.1%. We continue to make progress reducing our NOX emissions and have reached 23.1% of our goal to achieve a 20% reduction of NOX emissions intensity by 2025. These reductions were achieved by realizing the impact of the first full year of the NOX control system implementation at our carbon black facility in Shanghai, China and the completion of the first phase of the implementation of the NOXcontrol system at our Tianjin, China carbon black facility. We also recently completed the construction of a new NOX control system at our Pampa, Texas, USA facility and expect to significantly reduce emissions from that facility.