More than half of the world's biggest companies reveal details of their environmental and social performance, according to a KPMG survey that provides fresh evidence of business leaders' support for corporate social responsibility.

The survey, published every three years, found that CSR reports for 2005 now cover a much wider range of issues, and that many companies also provide CSR information in their annual financial reports. Fifty-two per cent of the top 250 companies in the Fortune 500 list published separate reports on corporate social responsibility, up from 45 per cent three years ago.