Generating some of the most excitement were activists from other nations who stood in solidarity with their peers.
"This march represents an incredible diversity of people, all realizing that this is the same fight."
"The time to act is now, and the People's Climate March is a groundbreaking step in the right direction."
When the People's Climate March kicks off in New York City on Sunday, Sept. 21, it is sure to be a powerful and diverse assembly.
Imagine coming home from work or school and not having access to water for cooking dinner, or not being able to take a shower after a hard day's work.
"Working people will suffer disproportionately from the current patterns of investment and neglect that do not prioritize good jobs, clean air, and healthy communities."
"Make it bigger, make it bolder, make it more challenging, because literally the whole world will be watching."
"We must walk the walk with the people in the struggles for economic and democratic reforms. Every victory does make a difference in people's lives."
The Obama administration is developing a more aggressive policy on environmental issues, as the president increasingly sees fighting climate change as one of the core components of his legacy.
Environmental activists and oil drilling opponents have many unanswered questions concerning several aspects of this type of operation.