By Simon Jessop and Huw Jones LONDON (Reuters) – Firms that check environmental, social and governance claims made by companies will be asked to follow a proposed new ethics code to help combat greenwashing, the chief of a global standards body told Reuters. Trillions of dollars have flowed into investment funds touting green credentials, but these can be misleading, a practice known as greenwashing. As a result, companies are increasingly being asked to disclose more about their actions on climate change and other issues such as board diversity. Companies in the European Union and globally fr…