The royal couple arrives in Boston Wednesday for a three day visit, their first in almost 10 to the United States.  The occasion —  the second annual Earthshot Prize Awards Ceremony.    The Earthshot Prize is a global environmental prize for discovery and innovation- celebrating new possible solutions to help repair and save the planet.  During their visit to Boston the Prince and Princess will meet with innovators, inventors and activists in celebration of this year’s 15 finalists.  Five winners to be awarded a one million dollar prize – per entry! One of the finalists is a Chicago based tech firm that specializes in turning carbon emissions into sustainable energy and other products like yoga and athletic gear and even running shoes.