There is no link between companies' pollution levels and profitability, which should push fund managers to opt for greener companies, according to a study. Trucost, which monitors environmental output, said it found for a second year running that the worst polluters were not necessarily the best in their sector...Simon Thomas, chief executive of Trucost, said: "There is a perception that buying green is some kind of compromise. In fact, we think in the long term the performance of less carbon-efficient companies will get worse because governments are going to impose the cost of polluting on them."