https://www.reuters.com/article/us-nissan-engine-epower/nissan-says-makes-breakthrough-with-engine-in-reducing-co2-emissions-idUSKBN2AQ1F7

Nissan Motor Co said on Friday it has reached a breakthrough in achieving a 50% thermal efficiency with its in-development e-POWER hybrid technology, which could lead to a further reduction of car CO2 emissions.