S&P's Global ESG scores are based on the Corporate Sustainability Assessment (CSA), which is an annual evaluation of companies' sustainability practices. It covers over 10,000 companies from around the world. The CSA focuses on sustainability criteria that are both industry-specific and financially material and has been doing so since 1999. All companies are assessed using the industry specific CSA questionnaire and methodology reflecting a company's score compared to its industry peers. The CSA focuses on past and current performance on ESG issues