Exxon touts clean tech in Olympic ads as climate pressure grows

By Terry Wade and Ernest Scheyder HOUSTON (Reuters) - Exxon Mobil Corp is running television advertisements at the Rio Olympics to showcase its work on clean energy, a high-profile blitz as the company faces pressure over global warming in an intense year of climate politics. The suite of four ads tout oil major Exxon's work to capture carbon dioxide from power plants, turn algae into biofuel and develop fuel-efficient cars. Many other fossil fuel companies also face pressure from shareholders,