> Ok we all know smoking is bad for us but is
> there any significant findings of light smoking causing improper
> healing in ligaments?. Also why are ligaments not able to heal with
> their original tissues?, why is it only scar tissue?.
These links concern smoking in general, not light smoking.
http://www.sciencedaily.com/releases/2006/10/061016121047.htm
http://www.jbjs.org.uk/cgi/content/abstract/88-B/8/1027
This link should help to explain the why's and wherefor's of ligaments
and scar tissues...
http://epe.lac-bac.gc.ca/100/201/300/cdn_medical_association/cjs/vol-41/issue-6/
0425.htm
There are still many unanswered questions about this subject.