1.  Is reducing the speed limit an effective means of reducing accidents?

2.  Letter-writing has often been an effective means of direction and Paul made the most of it.

3.  More effective means had to be devised to enforce the Forest law to protect vert and venison, and to raise revenue.

4.  Speed bumps are an effective means of stopping cars from going too fast.

5.  The only effective means of controlling outbreaks of this disease are mass vaccination campaigns.

6.  Vitamin supplements, which cost just a few cents a dose, are a highly effective means of prevention.

7.  We appear to be a long way from finding effective means of primary prevention of attempted suicide.

8.  Detecting the integrated hepatitis B virus DNA in hepatocellular carcinoma genome is an effective means of determining the clonal origin of hepatitis B virus related hepatocellular carcinoma.