Indonesia's Leuser Ecosystem is one of the few places where tigers, orangutans, elephants and rhinoceros all live in the wild.
But there has been talk of possible development of the area for geothermal energy -- heat that comes from the Earth.
Wildlife activists are worried about the plan.
Rudi Putra is an adviser at the Leuser Conservation Forum.
He asked, "Why do they want to build it inside Aceh's best remaining forest?" He believes that if the plan is approved, the area "will lose many, many animals."
The Leuser ecosystem is in Aceh, Indonesia's westernmost province. Last month, the provincial governor asked the central government to change zoning laws for 8,000 hectares of the ecosystem to permit geothermal exploration.
Under the plan, a Turkish company would explore part of the 800,000 hectare Gunnung Leuser National Park. The United Nations' Educational, Scientific and Cultural Organization (UNESCO) has declared the park a World Heritage site.
The re-zoning request was structured to help Indonesian President Joko Widodo. He has promised to add 35,000 Megawatts (MW) of electricity to Indonesia's energy grid by 2020. The plan is designed to increase renewable energy production.
But environmentalists worry that such a development would start a series of events leading to Leuser's collapse. Once the destruction is started, they say, officials would be powerless to stop it.
Farwiza Farhan leads a group called Forest, Nature and Environment of Aceh. She says "anywhere you put roads, destruction follows." She says timber companies and small farmers used the roads to gain entry to forests, leading to environmental destruction.
"Right now it is geothermal, but what's next? Even now they can't protect Leuser," she said.
Federal laws for protecting wildlife are in place. But in recent years, illegal development and logging has been a problem. Some observers say the ecosystem is shrinking by about 5,500 hectares a year.
In Sumatra, logging and land development for farming has destroyed almost one fourth of the forests since 2000.
Recently, the Indonesian environment ministry ruled on the Aceh provincial government's plan.
The environmental group Mongabay says the ministry denied the request. The group said it learned about the decision last week during a meeting of the International Union for Conservation and Natural Resources (IUCN) in Hawaii.
The minister's director for protected areas told Mongabay that the minister received the proposal. But "the result was disagreement with the rezoning, so that's that. The plan stops there," he said.
I'm Christopher Jones-Cruise.
Orangutan mothers face up to eight years of single parenthood raising their infants.
Contrary to its name, the black rhinoceros is actually grey in color.
These Michigan woods have been exploited for timber since the Great Fire of Chicago.
Logging companies would have to leave a central area of the forest before the end of the year.
1.But environmentalists worry that such a development would start a series of events leading to Leuser's collapse.
lead to 导致，通向
Heart failure led to her father's death.
The street leads to the supermarket.
2.She says timber companies and small farmers used the roads to gain entry to forests, leading to environmental destruction.
entry to... 通向……的入口
You should add an entry to this section.
In this process, the associated role is responsible for transforming its work products from the entry to the exit states.
列尤择生态系统位于亚齐这个印度最西面的省份 。上个月，亚齐省省长请求中央政府为这片8000多公顷的生态系统改变分区法，以便能够发展地热能 。
该提议建议由土耳其某公司开采古农列尤择国家公园这80万公顷的部分土地 。而联合国教科文组织（UNESCO）已宣布古农列尤择国家公园为世界遗产 。
重新分区的这项申请是用以助力印尼总统佐科的 。佐科总统已承诺会在2020年之前为印尼电网新增3.5万兆瓦的电能 。而该提议的目的就是增加印尼的可再生能源产量 。
但很多环保人士担心这样的开发举动会引起一系列事件，最终导致古农列尤择生态体系的崩塌 。他们认为，一旦破坏开始，谁都无力回天 。
法尔汉是亚齐省森林自然环境组织的负责人 。她表示，“只要铺路，破坏就会随之而来” 。她还说，木材公司以及小农场主都会走公路进入森林，并会导致环境破坏 。
保护野生动物的联邦法规已经出台，但近年来，非法开采和伐木行为依然是个问题 。一些观察家表示，古农列尤择生态体系正以每年5500公顷的速度缩减 。
环保组织Mongabay称，印尼环境部否决了这一提议 。该组织称其是在夏威夷举行的世界自然保护联盟会议上得知这一决定的 。
环境部保护区域的负责人告诉Mongabay组织，部长收到了该提议 。但“决议结果不支持重新分区，所以这就是结果 。该提议不得不叫停” 。