Organizers say more than 300,000 gathered in New York for climate protests . That 's impossible for McAvoy and the others I met on Sunday . The People 's Climate March is billed as the largest climate demonstration ever . CNN 's Tom Sutter says it 's easy for people to write off climate change . But he says that meeting people at the rally should cause a change of heart .
Organizers say more than 300,000 gathered in New York for climate protests . The People 's Climate March is billed as the largest climate demonstration ever . CNN 's Tom Sutter says it 's easy for people to write off climate change . But he says that meeting people at the rally should cause a change of heart .