U.S. oil companies Exxon Mobil and Chevron are looking to produce more renewable fuels.The two largest U.S. oil companies want to produce sustainable fuels without paying the billions of dollars usually needed to change the operations to make the products.People with knowledge of the efforts told Reuters the two companies are finding ways to make such products at their existing manufacturing centers.Renewable fuels account for 5 percent of U.S. fuel use.But that percentage is expected to grow as producers look to cut carbon emissions to fight climate change.Both Chevron and Exxon have large refining divisions that add heavily to their carbon emissions.The companies have been criticized for being slower to produce renewable energy than European companies, such as Royal Dutch Shell and TotalEnergies.The American corporations have spent less money than those companies on green technologies.
