Breathing in diesel exhaust leads to changes 'deep under the hood' by BobbyG | Jan 8, 2015 | Asthma in the News | 0 comments Diesel exhaust switches some genes on, while switching others off, by altering the methylation of DNA, scientists say. Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Notify me of follow-up comments by email. Notify me of new posts by email. Δ