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When you think of a fearsome hunter, images of lions and sharks may spring to mind. Recent research by 1 scientists, however, shows that in fact, humans are the most fearsome hunters who have the greatest impact on animal populations. Human activities have brought many animals close to 2 . In the last 500 years, over 300 species of animals have gone extinct. Some activities, such as hunting and fishing, directly harm animals, 3 other activities, such as development in towns and cities, impact indirectly on animal populations.
Hunting and fishing have directly influenced the world’s animal populations. Some people hunt animals for food: whale meat is 4 in some parts of the world. Some people hunt animals for fashion: animal skin is used to make coats and bags. Still others hunt animals just for fun: deer are 5 and shot by people who enjoy the 6 of the sport.
Human activities that have indirect effects on animals can be just as 7 . When we build farms or factories, we destroy animal habitats and leave many animals with 8 to live, or no food to eat. We can also put animals in danger without ever entering their habitats. Air, water, noise and light pollution can all have a deep and 9 influence quite far from their source. Partly due to pollution caused by ship traffic and other human activities, the dolphin population has 10 greatly. As the human population continues to grow, so does the effect we have on animals.