"It sure was an improvement," said Ms. Roberts, 75.
"The general trend is improvement," said Simon Balderstone, an environmental adviser for the I.O.C.
"It was a huge improvement," said Mr. Martínez, a native of Mexico City.
"We've seen more than 10 years of improvement," said Jeff Zimman, the company's chief executive.
"There's room for improvement," said the former Chelsea midfielder and manager.
"There's always room for improvement," said Dr. Colin D'Cunha, Ontario's chief medical officer.
"This is definitely an improvement," said Steven Wharton, an analyst at Loomis, Sayles & Company.
"There were signs of improvement," said Rolf Fehlbaum, the chairman of Vitra, the Swiss furniture group.
"Up until now there has been no improvement," said Mr. Moussa.
"There is a glimmer of some fundamental improvement," said Christa Quarles, an analyst with Thomas Weisel Partners.
"It's very bad and there are no signs of improvement," said Mark Bartolini, a spokesman for the committee.
