Some argue that there is no point in putting high prices on carbon or setting stringent emissions standards while CCS technology is uncertain, expensive and yet to be proven on a large scale. (scientificamerican.com)
I am assuming that these countries do not have as stringent emission standards or controls. (tamino.wordpress.com)
Last year the U.S. Environmental Protection Agency announced new more stringent emissions standards for marine engines — both in - board and outboard — that will go into effect in 2010. (scientificamerican.com)