The earth is 4.6 billion years old. We humans have lived on the earth for only 35,000 years, but during this period, we have changed our planet a lot in many ways. Some things we have done are very good for the earth while others are bad.
The Amazon rainforest in South America, at seven million km², is the largest rainforest in the world. The forest is important for people all over the world because it produces a lot of oxygen, and also helps to cool the weather. But large areas of the rainforest are being cut down for wood—55% of the forest could be gone by 2030! The World Wildlife Federation(WWF) is helping to stop some areas of the rainforest from being cut down.
At 68,000 km², the Aral Sea was one of the largest lakes in the world before the 1960s. Then rivers were diverted and it has been getting smaller ever since. By 2007, it was only 10% of its original size and had divided into three separate lakes. Dust storms happen again and again and the villages sit on the edge of a huge desert with large ships stranded(搁浅) in its sand. A dam has been built to try to bring back higher water levels in the North with some success.
In China, about 3,600 km² of grassland near the Gobi turns into desert every year. There are often storms that blow dust all the way to Beijing. The storms are getting worse each year and have a deep influence on farmers.
The goal of the Green Wall Project, started in 1978, is to increase forests in northern China from 5% to 15% in order to stop the desert from growing. The project faces many challenges. However, people must never give up on it.
Saving the disappearing nature needs everyone's effort. Although each one of us may only do a little, together we can make a big difference. What can you do to protect the environment?