Fossil fuel companies emit greenhouse gases—we know. But a new analysis says 20 such companies are responsible for over a third of all greenhouse gas emissions since 1965, the Guardian reports. Conducted by Richard Heede, an authority at the Climate Accountability Institute, the study says 20 companies have released 35% of the world's energy-linked methane and carbon dioxide in modern times. That includes state-owned polluters like Saudi Aramco, said to have released 4.38% of total world emissions, and eight investor-owned companies. The data covers each company's full supply chain from ground extraction to end use, per MarketWatch. The top 10, with CO2-equivalent emissions in billions of tons since '65:
- Saudi Aramco: 59.26
- Chevron: 43.35
- Gazprom: 43.23
- ExxonMobil: 41.90
- National Iranian Oil Co: 35.66
- BP: 34.02
- Royal Dutch Shell: 31.95
- Coal India: 23.12
- Pemex: 22.65
- Petróleos de Venezuela: 15.75
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