Yeah those 57 cause 80% of CO2... but it's because they're gas/oil/coal companies and most of our houses and cars run off those. So we DO need to also change the end user.
The report is interesting but also a bit misleading. It includes all emissions from a product as being from the company that made it. So you buy a car and drive it around for 100 000km and the pollution from that driving is attributed to the company.