From wikipedia, the most legitimate source of scholarly resources in existence:
"Texas ranks first among the 50 states as the largest emitter of greenhouse gases.[36] The state's annual carbon dioxide emissions are nearly 1.5 trillion pounds. Texas would be the world's seventh-largest producer of greenhouse gases if it were its own country, emitting more carbon dioxide than France, the United Kingdom, or Canada."
"Texas ranks first among the 50 states as the largest emitter of greenhouse gases.[36] The state's annual carbon dioxide emissions are nearly 1.5 trillion pounds. Texas would be the world's seventh-largest producer of greenhouse gases if it were its own country, emitting more carbon dioxide than France, the United Kingdom, or Canada."