Looking for a fun Earth Day activity?Try picking up litter while running slowly.It may sound strange,but the new“sport”is becoming very popular with runners all over the world.Many of them put the pictures of holding bags of rubbish on social media. Erik Ahlstrom came up with the idea.Early in 2016,Ahlstrom became bored at the growing rubbish on the road during his daily bike ride to his planting farm.Since picking up rubbish while on his bike was hard to do, Ahlstrom began joining the activity into his daily runs. “I was surprised at so much junk in nature,”he said to the people around.“The same bottle could lie on the road for several weeks without anyone picking it up,so I started doing it.I felt happy to clean up a small piece.” Other joggers soon joined Ahlstrom.By the end of 2016,the activity had become so popular that official “plogging”events took place all across Sweden.Many groups of runners also took part in it.As plogging became popular on social media,the new“sport”started to spread beyond Sweden first to other European countries and then worldwide now.