The 38th Earth Day is being celebrated April 22. In conjunction with the national day, organizations were launching their own campaigns and events built around the green theme.

Bridal Expo Chicago was set to host a "Green Wedding Expo" on Earth Day, signifying the growing trend of "green weddings" in the US, as well as the importance of an eco-friendly lifestyle.

"Today's couples [can] make a personal statement at their weddings in front of guests by incorporating green elements," says ...