In Illinois, for instance, a volunteer group adopts a two-mile section of highway and agrees to remove litter at least four times a year.

In areas with adequate precipitation, burning is used to remove litter, which then stimulates the stems to produce more green matter.

But he said the highest priority for the cleaners was removing graffiti and litter.

Government neglect, the inability of governments to remove litter in a timely manner, is also a reason why humans are tempted to litter.

Polish volunteers began in 2012 an annual event to remove litter.

In 2008, the park underwent a £100,000 transformation to remove graffiti and litter and to install sports pitches.

After completing the climb, he organized a group of climbers to begin removing litter.

Continuing efforts are being made to remove litter and sewage from Mt. Fuji.

Their tasks might include removing graffiti, litter or snow.

Volunteers were provided with the equipment necessary to remove litter from campsites and lakes.