Clearly, our present and future environmental problems must be solved at all levels.

We have to keep our attention on solving Earth's problems at home.

"And maybe your problem would have been solved at the end of it."

"I wonder if we are serious enough about energy to solve the problem at long last."

That's a question many people are trying to solve at this moment.

I have an idea that might work, and it could solve another problem at the same time.

What they need is the information to solve the particular task at hand.

It would be good to try to solve the problem at the source.

Murder was always solved at a cost, sometimes to himself, more often to others.

If you were trying to solve cancer at two places, no one would think that was enough.