阅读理解Human activity is bringing big trouble to Mount Qomolangma. Both microplastics ( 微塑料)and climate (气候) change have a bad effect (影响) on the mountain, scientists say.
The highest mountain in the world is facing the problem of microplastics. A recent study found that the mountain is full of these plastics, which are usually less than 5 millimeters in size. They canbe found in many things, including the clothing, tents and ropes that are left behind by climbers.
Microplastics take thousands of years to break down ( 分解) on their own. They are already known for posing a danger to sea animals. Now people are worried about Qomolangma, as themountain already suffers (遭受) from serious pollution.
Global warming is also affecting the mountain, as well as its climbers. Another study points out that the glaciers (冰川) around Qomolangma have thinned by nearly 100 meters since the 1960s. As the ice melts (融化), cracks (裂缝) in the ice are becoming deeper and more dangerous, bringing danger to those who try to climb the mountain, according to Global News.
Landslides (滑坡) are also becoming more probable. There are many parts of the mountain that are held together by just frozen rocks or permafrost (永久冻土), according to Professor Joseph Shea at the University of Northern British Columbia, Canada. When this permafrost melts, the risk of dangerous landslides goes up.