Carbon monoxide is also a primary toxin found in many types of vehicle/machine exhausts.
Hope that helped =)
The most simple answer might be hormones. It could be that the person doesn't want to let the other individual down or think less of them.
Decongestants tend to unblock your nose and chest, it depends or how clogged you feel. An antihistamine is supposed to block or slow the release of histamine, which produces the excess mucus. If your nose is running and you are sneezing, you may can get by with just an antihistamine. Now if you are like me and woke up sneezing your head off, but your lungs and nasal passages are still clogged, you need to take the decongestant too.
<span>The first step used by the EPA when creating environmental protection regulations is letter C, research. EPA has its central station in Washington, D.C., local workplaces for each of the organization's ten districts, and 27 research facilities. The organization leads an ecological evaluation, research, and instruction. It has the obligation of keeping up and authorizing national norms under an assortment of ecological laws, in meeting with state, tribal, and neighborhood governments.</span>