Because of the connection between greenhouse gases and climate change, there has been a concerted to reduce greenhouse gas emissions. The decrease in CO2 emissions in 2015 from fossil fuel combustion was a result of multiple factors, including ALL BUT: A) a slight decrease in the use of public transportation throughout the country. Eliminate B) substitution from coal to natural gas consumption in the electric power sector. C) a slight decrease in electricity demand due to conservation efforts in all sectors. D) warmer winter conditions resulting in a decreased demand for heating fuel in the residential and commercial sectors.