nose test

In many cases, said Henry J. Stern, the president of the Citizens Union, a civic group, and a former city Parks Commissioner, "you have to apply the nose test." "Does it smell?" he said, referring to such deals. "Is it based on a personal relationship? Does it run contrary to the city's interest?"

Make the "nose test" sniffing for fumes, before starting engines.

The pollen blocker cream appeared to help; after using the cream, people did better on the nose test.