ST. PAUL (AP) — Protect the environment. Support the troops. Show some college pride.

Special Minnesota license plates that act as state-sanctioned billboards and fundraising tools for pet causes are causing angst among some lawmakers, who are worried about where to draw the line. Another handful of special plate requests are before the Legislature this year.

They would add to a cache of plate variations that now tops 200, according to state officials.

The House Transportation Committee heard Tuesday from backers of plates to raise breast cancer awareness and research dollars, to recognize retired firefighters, to promote organ donation and to help the American Red Cross raise disaster relief money.

Some lawmakers admit it's tough to say no, but they worry that many special plates aren't making up for the cost to produce them.

Copyright 2013 The Associated Press.