On December 22, 1975, the United States passed the Energy Policy and Conservation Act (EPCA), commonly referred to as the crude oil export ban. This law was passed in response to an oil embargo imposed by OPEC, which was driven by its Arab country members, in response to the United States supporting Israel during the 1973 Arab-Israeli War, also referred to as the Yom Kippur War. The EPCA, with some minor exceptions, banned the export of all domestically produced crude oil. However, a consolidated appropriations bill, which was passed on December 18, 2015, had a clause which removed Section 103 from the EPCA. That was the part of the EPCA banning exports of crude oil.

Crude oil exports started almost immediately. The first crude oil export from the Port of Corpus Christi was on December 31, 2015 and the crude oil exports from the Port have increased dramatically year-over-year since that time. There has been a massive increase in CO2 greenhouse gases being emitted into the atmosphere as a result of the crude oil exports being shipped through the Port of Corpus Christi. For the full details of the disastrous effects of the repeal of the crude oil export ban on increases in CO2 greenhouse gases, please read the below PDF (clicking on the title will download the PDF):

Crude oil exports from the Port of Corpus Christi and the resulting CO2 greenhouse gases

The effect on climate change of the 2015 repeal of the 1975 crude oil export ban