Complex sentence: Snus use among adolescent groups has worried many leading public health officials; snus may aid youth in cessation of smoking or in harm reduction, but it can also be used in conjunction with cigarettes and thus increase risk for disease.
Split into simpler sentences: Snus use among adolescent groups has worried many leading public health officials. Snus may aid youth in cessation of smoking or in harm reduction, but it can also be used in conjunction with cigarettes and thus increase risk for disease.