Almost every country in the world just signed on to the #ParisAgreement on climate change
New text is "ambitious and balanced"
Some new EU cars, including Mercedes, BMW and Peugeot vehicles, were using around 50 percent more fuel than manufacturers claimed.
Deadline to submit convincing reform plans is this week.
About 190 nations agreed on Sunday the building blocks of a new-style global deal due in 2015 to combat climate change amid warnings that far tougher action will be needed to limit rising world temperatures.
China is the top greenhouse gas emitter, ahead of the United States, the European Union and India.
So far, major emitters are far from curbs on emissions on a scale outlined by the IPCC.