Citizen 'manifesto' for T in the Park
T in the Park bosses have launched a Citizen T manifesto to encourage music fans to take more care of the environment.
Festival goers will be asked to bin their litter, take home their tents and look out for each other at this year's festival, which runs from 9 to 11 July.
Organisers said small things could bring big changes to Scotland's biggest music festival.
Acts this year include rapper Eminem and rock bands Muse and Kasabian.
The event is being held at Balado in Perth and Kinross and 85,000-strong crowd is expected over the weekend, many of whom will be camping at the site.
A new yellow hand logo will represent the five points in the Citizen T manifesto, which also states: "We pledge allegiance to T in the Park and believe in being good citizens."
Colin Roger, from organisers DF Concerts: "The T in the Park crowd is known for being one of the best-spirited and most passionate in the world.
"With Citizen T we're hoping to capture that amazing energy and give music fans the power to make a difference in some of the areas where we know that they would like to see change, such as litter and tent re-use.
"The festival is renowned for its organisation and beautiful site, but there's always room for improvement and we strive every year to make that happen."
Mr Roger said individual actions, like binning litter, could have a "huge impact" on the event.
"We can't do this without the help of every single person on site, so it's exciting to see what we might be able to achieve collectively with the power of our fantastic T in the Park fans on side," he added.
To mark the manifesto launch, T-Break artist Anna Meldrum, from Kitty the Lion, wore a dress made from recycled festival tents to illustrate the message about taking tents home.
She said: "Citizen T is such a great idea, as it's all about making T in the Park as enjoyable as possible for everyone.
Hopefully, through this amazingly creative dress, more music fans will be inspired to reuse their tents after this year's festival."
Tickets for the 2010 festival sold out just 90 minutes after going on sale in February, according to DF Concerts.
In May, Perth and Kinross Council approved a request from organisers to allow 5,000 extra camping spaces for people arriving on the Thursday night.