Gasoline is a refined petroleum product used as fuel in internal combustion engines. It is made from crude oil and other petroleum liquids. Gasoline contributes to air pollution and methods of crude oil extraction like hydraulic fracturing can cause water pollution. The EPA's Clean Power Plan aims to reduce climate change by encouraging Texas to transition from gasoline to natural gas, which Texas has in abundance. This could open manufacturing jobs but also signals a shift away from the oil and gasoline that currently dominate Texas's economy as the largest oil producing state.