1.   Both are more refreshing than a toner - and more effective methods of removing the last traces of make-up and oil.

2.   Collecting in Person Despite the time and inconvenience involved, this is the most effective method of collection.

3.   For surface transport, although an equally high energy density fuel is unnecessary, an effective method of energy storage is vital.

4.   It is possibly the least effective method of change because it depends on two steps both of which are unnatural.

5.   Speech is the most effective method of human communication.

6.   The rewrite rule is an effective method of representing the rules of a generative grammar.