Why do people live so long in simple economies and very tough environments?

It's understood that this is a very tough political environment for Republicans.

"It's especially satisfying after the week we've been through to win on the road in a tough environment."

"We've learned how to survive in a very tough environment."

"Now, they'll have to do it in a much tougher environment."

That can be a very tough environment in which to survive.

But we were doing a tough job in a tough environment.

However, he acknowledged that the tough economic environment had affected some parts of the business.

And he has had a tough environment to deal with.

In any event, it's a tougher environment for young analysts who are trying to get ahead.