In June last year, he said Keystone could be built only if it «does not significantly exacerbate the problem of carbon pollution». (newscientist.com)
Obama said that the pipeline could be built only if it «does not significantly exacerbate the problem of carbon pollution ``. (newscientist.com)
President Obama has said that he would approve the pipeline only if it «does not significantly exacerbate the problem of carbon pollution.» (news.nationalgeographic.com)