'Under siege', oil industry mulls raising returns and PR game

DAVOS, Switzerland (Reuters) - When the global oil industry held its biggest annual gathering this week in the Swiss town of Davos, it had two key topics on its agenda - climate change and pressure from investors.The conclusion of the discussions was worrying for those present - pressure is rising and the industry is losing a battle not to be seen as one of the world's biggest evils.The answer? Lure investors with higher returns and raise the PR game."There is no doubt - and there is a consensus..