A Public Interest Litigation, also known as PIL, is a form of litigation that is filed to safeguard or enforce the public interest. Public Interest is the interest belonging to a particular class of the community that affects their legal rights or liabilities. It may include pecuniary interest. Courts have interpreted and defined PIL. The Hon’ble Supreme Court of India has, in the case of Janata Dal v. H.S.Chaudhary (AIR 1993 SC 892), held that lexically, the expression ‘PIL’ means a legal action started in a court of law for the enforcement of public/general interest where the public or a particular class of the public has some interest (including pecuniary interest) that affects their legal rights or liabilities. PILs are considered to be the most effective as well as the most commonly used judicial tool to safeguard the environment due to their many advantages, including but not limited to speedy results, nominal court fees, relaxed procedural rules and the wide variety of investigative techniques available to courts like special committees. Any individual or organisation can file a PIL either in his/her/their own standing i.e. to protect or enforce a right owed to him/her/them by the government or on behalf of a section of society who is disadvantaged or oppressed and is not able to enforce their own rights. The concept of “Locus Standi” has been relaxed in the case of PILs so as to enable the Hon’ble Court to look into grievances that are filed on behalf of those who are poor, illiterate, deprived or disabled and are unable to approach the courts themselves. However, only a person acting in good faith and who has sufficient interest in the proceeding will have the locus standi to file a PIL. A person who approaches the Hon’ble Court for personal gain, private profit, political or any oblique consideration will not be entertained. Suo moto cognizance may also be taken by the Court.