mark ansell, bbc news, chesterfield. its own emissions standards on cars. the president claimed in a tweet that the move would allow manufacturers to make cheaper, safer cars and create jobs. the governor of california has described the president's claim as "factually inaccurate," and the state has begun a legal challenge — as gareth barlow reports. los angeles — america's second largest city is known for its sweeping skyline, hollywood sign, and, in the past, smog. in the 1970s, as cars choked the streets and their emissions choked the air, the state was allowed to set its own tough environmental standards. now, though, donald trump has reversed that. in a series of tweets he said... the president also claimed the move would lead to the manufacture of more cars and create more jobs. the governor of california, gavin newsom, disagreed. it's about the oil industry. period. full—stop. it's not about the car manufacturer, it's not about consumers, it's not about the health, it's not about our economy. it's about oil compani