The preoccupation towards environmental issues within companies has increased in the past years. On one hand, companies now aim at cleaner, environmental products or production lines. On the other hand, many companies have started to invest in different CSR projects, having as objective different environmental issues. In this article we focus on a set of aspects and indicators reported by energy companies, regarding their environmental performance. The need for a cleaner environment has determined policy makers and different organizations to adopt several guidelines referring to environmental activities of companies. Based on the CSR and sustainability reports of 92 top energy companies, we analyze the main environmental aspects and indicators which were revealed by these organizations in year 2015. Results of this qualitative analysis could contribute to the assessment of the extent to which environmental standards are currently taken into account by energy companies.