by Pablo IZMIRLIAN Agence France-Presse   PIRIÁPOLIS, Uruguay (AFP) — On a hot summer’s day in southern Uruguay, Graciela Martinez weighs her plastic waste before dropping it in a designated container by the beach. In return, she’ll receive some virtual money on her phone that she can use for discounts on purchases at restaurants or partnered shops. It’s part of a pilot environmental project called “Plasticoin” aimed at encouraging plastic recycling in the South American country. […]