In article ZIE2k.695$8q2.299@trnddc02,
M Q wrote:

Rich256 wrote:

...
The gas company repair man said my grass
would die if there was a leak (burn??).

I am skeptical about that (unless the escaping gas was on fire).
Has anyone heard of this before?

Yep. Many gas companies suggest using that as an indicator.
Just a couple I ran across post Google:
http://www.gulfstreamgas.com/recognizing_leak.htm
http://www.pplgas.com/home/using+nat...ipeline+safety.
htm