Pocket-lint Facebook Twitter Pintrest LinkedIn Google+ Mail 0 Comments 22 April is Earth Day - an annual event to celebrate and demonstrate support for the planet through environmental protection. Earth Day has been running since 1970 and this year Pokemon Go players are being encouraged to get involved. Niantic , in collaboration with conservation organisation Mission Blue , is planning 37 clean-up events across 12 countries on 22 April. Pokemon Go players are being encouraged to join in with these events and help rid their local areas of litter. Most of the events are located on the coast and the obvious focus is on removing litter which might otherwise make its way into the oceans. Clean-up events will last for around two hours and will see players helping collect rubbish alongside local organisers. What are the in-game rewards? Niantic is tr...