in the fridge? To solve this problem, a company has created a small but powerful device called saverpack. The device is a plant-based, rechargeable "food saver" that you place inside your refrigerator. It works by absorbing the ethylene gas (乙烯气体) that fruits and vegetables produce as they ripen. By removing this gas, the saverpack can keep your food fresh up to three times longer. It's an easy way to save money, reduce food waste, and protect the environment.
Clean water for everyone
In some areas, people cannot easily get safe drinking water. People worked together to create the filter-cap. These small, easy-to-carry filters fit onto the top of water bottles. Users can fill their bottles from wells, ponds, or rivers, and the special filter inside the cap removes harmful substances, making the water safe to drink. One filter can clean up to five liters of water each day.

Solar-powered tents for emergency relief

When natural disasters like earthquakes or floods happen, many people lose their homes and need shelter. Traditional tents can be dark and offer no way to charge phones for communication. A new invention called light-shelter aims to change that. This tent has a flexible solar panel built into its roof. During the day, it collects energy from the sun to power built-in LED lights. It also has USB ports, allowing families to charge mobile phones and small medical devices, providing safety, light, and a connection to the outside world during difficult times.
1. What is the main idea of the article? ()
A. To explain why new inventions are often too expensive.
B. To advertise the latest camping equipment from big companies.
C. To introduce creative inventions that aim to improve people's lives.
D. To compare different ways of producing clean energy.
2. Read the article again and complete the table below.

| Feature | Invention |
| --- | --- |
| It helps reduce the problem of food waste at home. | (1) |
| It has a filter to purify water from rivers. | (2) |
| It is especially helpful for people who have lost their homes in a disaster. | (3) |

1. C
2. (1) saverpack
(2) filter-cap
(3) light-shelter