Succulents（多肉植物）can usually stay wet in hot and dry days. They are easy to plant as well.

Get the pots（盆）ready. Make sure that you are not using either too large or too small a pot. There should be three or more holes at the bottom of the pot. Clay pots are the best for planting succulents. Fill one third of the pot with small stones.

Fill the pots with potting mix. Hold the plant carefully at the center of the pot and place the potting mix around the plant until it covers them up.

Provide good sunlight. Succulents prefer bright light. So place the pots in an area where there is plenty of sunlight. The best sun time will be from morning to noon during the summer.

Water your plant. The first watering will be done on the third day of planting. Watering at a later time will depend on the growth of the plant. A good rule is that the potting mix should be allowed to dry up before the next watering. It is suggested to water twice a week during the summer, every two weeks during early and late winter and once a month during the coldest weather.

Fertilize（施肥）it. Do it during the summer growing season, as you would with other houseplants. Stop fertilizing completely during the winter. The nitrogen content（含氮量）of the fertilizer should always be very low.

Many people depend on groundwater for drinking and other uses. It is a lifeline for people especially in parts of the world where rainfall and surface water are not enough, such as northwest India and the southwest United States. The reduction in groundwater can make it harder for people to get freshwater to drink and can result in land subsidence (下沉).

According to a new study, groundwater is reducing quickly in many parts of the world. The research studied groundwater from 170,000 wells in more than 40 countries. The study will help scientists know humans are having a great influence on this valuable underground resource (资源). Also the researchers studied 1,693 aquifer systems (蓄水层系统) and found groundwater levels fell in 71% of them between 2000 and 2022.

The study also stressed some success stories in Bangkok, Arizona and New Mexico, where groundwater has begun to get better. “I was touched by the clever ways that have been put into action to deal with groundwater reduction in several places, though these ‘good news’ stories are not common,” Jasechko said.

Now let’s have a look at their clever ways…

Toothpaste (牙膏) does more than just keep our teeth bright and white. It can be used wisely in many other ways. Here are some useful tips that can save us time and money.