California students are making sure that green energy initiatives are being spread throughout the country and world.

Grade school students at Sun Valley Elementary School in San Rafael have recently been pushing for Crayola to start a recycling program for their spent plastic markers.

An estimated 40 students at Sun Valley have been circulating an online petition to encourage Crayola to develop a program for used markers, according to The Associated Press. The students would like the company to collect the used markers in order to recycle them.

The petition recently reached 60,000 signatures, but Crayola spokeswoman Stacy Gabrielle announced that the company already pursues many green initiatives and has no plans of offering a marker recycling program, the AP reported. The company uses solar energy to make about a third of the 3 billion crayons it produces yearly, and Gabrielle also expressed that marker caps can be recycled at certain facilities.

Crayola also recently partnered with Pennsylvania utility companies to launch a 15-acre solar farm that will generate electricity. The famous crayon and school supplies company is headquartered in the Pennsylvania community of Forks Township.