We'd die in natural disasters and man-made ones, too, such as war.

I don't know what the difference between natural caves and man-made ones is, but the air feels different, it just does.

Conan could use the weapons nature gave him as fiercely and effectively as the man-made ones whose ways he had learned.

Another misconception is that "it is generally accepted that natural sources of tropospheric chlorine are four to five times larger than man-made ones".

Still, it was backbreaking work and, as Peter had said, often dangerous, not only from natural occurrences but from man-made ones, as well.

As a result, they have more often lent their presence to natural disasters than man-made ones.

To these natural obstacles they added man-made ones, damaging or sinking available boats and destroying the bridges.

The C isotope is important in distinguishing biosynthetized materials from man-made ones.

Jennifer did not like heights at all when they were man-made ones.

Although almost no one expects such puzzles to replace man-made ones completely, computer-generated puzzles now account for an increasing share of those on the market.