It all started as a protest over a Santa Barbara oil spill in 1969, and from the first Earth Day in 1970, it has become the single largest non-religious observance worldwide. Millions of people in 192 countries will participate in Earth Day activities this Saturday, April 22. Chances are pretty good you are one of them. San Diego participates with the largest free all-volunteer Earth Day event in the world at Balboa Park. It takes place this year on Sunday, April 23, from 10 a.m. to 4 p.m. If you attend, you can talk with 300 exhibitors, see the Children’s Earth Parade in the morning, an arts and crafts show, and plenty more.… Read More