【推荐1】India and China are leading the global greening effort, a latest NASA study said, observing that the world is a greener place than it was 20 years ago.

Data from NASA’s satellites show that human activities in China and India play an important part in this greening of the planet, thanks to tree planting and agriculture. The effect comes mostly from tree-planting programs in China and intensive agriculture (集约农业) in both countries. “China and India account for one-third of the greening,” said lead author Chi Chen of Boston University.

China alone accounts for 25 percent of the global net increase in leaf area with only 6.6 percent of global vegetated (有植被的) area. The greening in China is from forests and farmland, but in India, it is mostly from farmland with minor contribution from forests. China’s great contribution to the global greening trend comes in large part from its programs to protect and expand forests.

“When the greening of the earth was first observed, we thought it was due to a warmer, wetter climate and fertilization (施肥) from the added carbon dioxide (CO²) in the atmosphere. Now with the satellite data, we see that humans are also contributing,” said Rama Nemani, a research scientist at NASA’s Ames Research Center. “Once people realize there is a problem, they tend to fix it. In the 1970s and 80s in India and China, the situation about vegetation loss was not good. In the 1990s, people realized it, and today things have improved. That’s what we see in the satellite data,” added Nemani.

The land area used to grow crops is comparable in China and India, and has not changed much since the early 2000s. Yet both countries have greatly increased both their annual total green leaf area and their food production. This was achieved through multiple cropping practices, by which a field is replanted to produce another harvest several times a year. Production of grains, vegetables, fruits and more has increased by about 35% — 40% since 2000 to feed their large populations.

【推荐3】Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your choice of sport might have great influence on the environment.

Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemical and huge amounts of energy are used to keep its courses in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.

There are many environment-friendly sports. Power walking is one of them that you could take up today. You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.

Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.