Scientistssay only enlarging the world’s nature reserve to help protect plants a-组卷网

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Scientists say only enlarging the world’s nature reserve to help protect plants and animals may be useless. The main reason is that levels of human activity are rising in and around the nature reserves. In fact, recognizing spaces as protected areas is not reducing human activity there.

The researchers found that a lack of money to pay for land conservation（保护）is affecting conservation efforts. And it is a lack of communication between people who live in protected natural areas and outsiders. About 17 percent of the world is within protected areas, including the national parks, nature reserves and wilderness areas. Protected areas are important for supporting environments with many different kinds of plants and animals.

The researchers again found increasing human activity in most protected areas in every country. However, they said that human activity appeared to be more of a problem in nations with fewer roads and lower life standards on the Human Development Index（指数）. The index uses information about life length, education and earnings to grade countries on human development.

Across the northern Australia, protected areas often proved effective at slowing human activity when compared with unprotected areas. But in South America, Southeast Asia and African countries, pressure from human activity inside protected areas was higher.

Experts say governments need to provide fund support to help protected areas. Simply recognizing a place as a protected area can’t be the beginning and the end of a conservation effort. Working with local people to take efforts is also important. If they’re not partners in the protected areas, then wildlife conservation is much more difficult.

【小题1】What are protected areas mainly affected by according to the text?