The corporate world is increasingly becoming aware of the dynamic nature of its laws and policies, and has actively started functioning towards it. The observance of ESG goals by corporations is a de-novo approach towards the achievement of SDGs, and is an improvement over the already existing concept of CSR. Even credit rating agencies are considering ESG factors while assessing the creditworthiness of corporates, because under the ESG regime, corporations are responsible for their Environmental, Social and Governance initiatives, towards a better and sustainable tomorrow. This paper studies the environmental sustainability of various industries of the energy sector that have been filing their BRSR reports while following their environmental policy. Studying energy sector is important, because ultimately, one of the prominent parameters of every BRSR report is the amount of energy consumed in the industrial process. Herein, a comparative study shall be made taking regard to amount of energy generated and the various other parameters reported in a BRSR report. The study reveals that BRSR reporting is an effective and reliable method to access the actual compliance of environmental policy regulations by corporations. Further, the paper also enlists various shortcomings in the BRSR reporting system.