Philadelphia's first Earth Day was in 1970 and advocates say there's still work to be done

Philadelphia hosted Earth Week in 1970 to celebrate Earth Day. Advocates say there's still work to do to improve the city's environmental record. The city is one of the fastest-growing cities in the world to host the first Earth Day in 1970. Philadelphia is the first city to host Earth Week, but advocates say it's not enough.

Communities across Philadelphia region to plant trees, highlight importance of preserving planet on Earth Day. Communities across the Philadelphia region are taking time to help pay it forward for the planet. Earth Day is on Monday at 8 p.m. ET on CNN iReport.com Live.

Philadelphia expanded Earth Day to Earth Week in 1970. Celebrations were fueled by energy and anger. The celebration included a huge concert at Fairmount Park. The first Earth Day was held in Philadelphia in 1970 and was expanded into Earth Week. The event was inspired by a series of environmental protests against the government.

Pennsauken, New Jersey, mayor says protecting the only place he's ever called home is especially important. Marco DiBattista says protecting his home is important on Earth Day. Mayor: More than 1 dozen trees will be planted in Penn's New Jersey town.

Volunteers plant trees in Southwest Philadelphia to get a head start on Earth Day. Volunteers planted trees Wednesday with the Pennsylvania Horticultural Society and Mid-Atlantic Environmental Protection Agency. Volunteers also planted trees in Philadelphia's Philadelphia suburb of Philadelphia. Earth Day is April 8. Watch the full video of the event at 9 p.m. ET on CBS Philadelphia.

Volunteers get a head start on Earth Day by planting trees in Southwest Philadelphia. Volunteers partnered with the Pennsylvania Horticultural Society and the Mid-Atlantic Environmental Protection Agency. Marcella Baietto shares how even the CBS Philadelphia team got involved Wednesday while partnering with the PHS.