- Actor Imran Khan has taken on the state government for raising the drinking age to 25. The actor plans to file a public interest litigation against the new regulation.(Times of India)
- The city-based NGO Aapla Parisar will file a public interest litigation (PIL) demanding reinstatement of former municipal commissioner Mahesh Zagade and probe into the NCP's role in the transfer.(ibid.)
A petition is as an official document in which you ask a court to take legal action (Macmillan Dictionary) whereas litigation is the use of the legal system to settle a disagreement (Macmillan Dictionary) or the process of taking legal action (Oxford English Dictionary).
Hence, one files a public interest petition (PIP), not a public interest litigation (PIL).
Here are a couple of links you might find interesting:-
1. Going forward http://www.guardian.co.uk/media/mind-your-language/2011/aug/30/mind-your-language-going-forward
2. Name that thing is a visual vocabulary quiz in which you are shown an image an object and you need to choose its correct name (or the name of a specific part of an object indicated by an arrow) from among four options. A quiz consists of ten questions and at the end of it you can choose to take another quiz with a new set of images. You will certainly learn new words but it is unlikely that you will use many of them. It is interesting, nevertheless.