When I said greenhouse gas didn't directly impact, I meant that if you breathe greenhouse gases, you do not have a health effect. If you breath PM and ozone, you do have a health effect.
Climate change and calculating—
On May 17th, 2007. See this statement in context.
May 17th, 2007 / 12:45 p.m.
Acting Manager, Air Health Effects Division, Healthy Environments and Consumer Safety Branch, Department of Health
When I said greenhouse gas didn't directly impact, I meant that if you breathe greenhouse gases, you do not have a health effect. If you breath PM and ozone, you do have a health effect.
Climate change and calculating—
See context to find out what was said next.