According to a study published in the journal Nature Sustainability in February, China and India are     1    (main) responsible for making the Earth greener over the past two decades. Since 2000, the Earth's green leaf area     2     (increase) by 5 percent, or over 5 million square kilometers. That’s     3     area equal to the total area of the Amazon rainforest. It is basically the result of many big tree-planting     4    (project) in China and intensive agriculture(集约农业) in both countries.

China and India contribute     5     one third of the increasing greening, but contain only 9 percent of the planet’s land area covered in vegetation(植被). China was the major contributor,     6    (add) 25 percent to this increase, while India added 6.8 percent.

Over the past few decades, China has made great efforts to green the land. In 1978, China     7    (begin) a national-level forestation project-the Three North Shelterbelt Forest Program, also     8    (know) as the “Great Green Wall”. The program has seen many trees planted in northern China to act as windbreaks(防风林). By the end of 2017, the forest coverage rate had reached 13.57 percent, compared to 5.05 percent 40 years ago.

In the light of China’s     9    (succeed) in greening the desert, the UN believes the country is a good example for others     10     (follow) and has lessons to share with the world.

Every day people throw away a lot of household garbage — paper, cans, kitchen waste, used batteries and glass without     1    (sort) it. There are many problems     2    (cause) by unsorted garbage. On one hand, it’s     3     great waste of resources. On the other hand, the disposal of unsorted garbage can cause serious environmental pollution,     4     does harm to people’s health. Now our government has realized the importance of garbage sorting. So far many     5    (activity) have been held to teach people how to sort garbage     6    (proper).

People in cities, like Beijing and Shanghai, are required to sort garbage into four categories — kitchen waste,     7    (danger) waste, recyclable waste and other waste. Also, they can get certain points for sorting their garbage. When they accumulate enough points, they can go to the community     8    (exchange) them for some gifts of daily use. However, still a lot of people in China lack the awareness     9     garbage sorting. Changing people’s mindsets and habits will take a long time. But once one person     10    (develop) the habit of garbage sorting, more may be influenced to do the same.