We found that vegetation is a powerful cooling mechanism. It appears to be the most effective tool to reduce surface temperatures.

Doubt is sometimes an effective tool not in the hands of fool, but wise being truly nice to see, sieve and serve with the truths from the world of lies.

Right now, that is the only tool that is effective in controlling avian influenza.

We feel that subscriptions will be a very effective marketing tool for the lottery.

The vote is the most powerful nonviolent tool we have.

Stories are the single most powerful tool in a leader's toolkit