King Features provides comics and other items for nearly 5,000 newspapers and has had good success in rallying cartoonists to go "green" Tuesday, USA Today reported.

"The number of cartoonists who responded to this call is thrilling. We have a few cartoonists who are green all the time," the syndicate's comics editor Brendan Burford said to the newspaper.

Arctic Circle, a strip by Alex Hallatt, follows the journeys of endangered polar bears and penguins.

"I try to see the funny side of being green. But whenever there's that conflict between modern life and going green, there's a great potential for humor," Hallatt told USA Today.