Page 270 - Grammar Explorer 2 - demo

LESSON 3 Adverb Clauses: Future Conditional

EXPLORE

1 READ the article about the effects of noise on dolphins and whales. Notice the
CD3-06
words in bold.

The Sounds of the Sea

Whales and dolphins use sound to locate food, find their way through the dark
oceans, and communicate. Sometimes, however, human noise interferes with the sounds
that whales and dolphins make. The result can be very harmful to these animals.
Underwater, sounds are louder and travel farther. Scientists believe that even distant
noise from human activities can disturb dolphins and whales. This noise can come
from ships, submarines, and the equipment that is used to search for oil and gas.
1
Underwater noise causes whales to increase how loudly they communicate. However, if
the underwater noise gets too loud, whales and dolphins will stop communicating.

If dolphins and whales stop communicating, important information will be
lost. For example, a dolphin that finds food won’t be able to tell other dolphins. Mother
whales will lose contact with their babies. Animals may die on the shore instead of
finding their way across the sea.
What can we do to protect dolphins and whales? We can try to create less noise.
Ships and submarines can avoid areas with a large number of these animals. Scientists
also believe that a “curtain” of bubbles around industrial sites will reduce noise
2
underwater. If we do nothing, dolphins and whales will suffer.

1 submarine: a kind of ship that can travel underwater
2 bubble: a small ball of air found in a liquid

Dolphins swimming off the
coast of the Bahamas

250 CONJUNCTIONS AND ADVErB CLAUSES
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