A librarian in Indonesia’s Java island is lending books to children in exchange for rubbish they collect in a novel way to clean up the environment and get the kids to read more.

Each weekday Raden Roro Hendarti rides her three-wheeler with books     1    (pile) up at the back for children in Muntang village to exchange for plastic cups, bags and other waste that she carries back.

She told Reuters she is helping develop reading in the children as well make     2    (they) aware of the environment. As soon as she shows up, little children, accompanied by their mothers surround her "Rubbish library" and cry for the books.

They are all carrying rubbish bags and Raden's three-wheeler     3     (quick) fills up with them as the books fly out. She s happy that the     4     (kid) are going to spend less time on online games as     5     result.

Let us build a culture of literacy from young age to     6     ( less) the harm of the online world. Raden said. "We should also take care     7     our waste in order to fight climate change and to save the earth from rubbish" Raden said.

She     8     (collect ) about 100 kg of waste each week,     9     is then sorted out by her colleagues and sent for recycling or sold. She     10     (lend) 6,000 books to children so far and wants to take the mobile service to neighboring areas as well.

Important as face masks(口罩)are in our current world, they have a major impact on     1    environment. Now scientists have demonstrated a novel method for     2     (clear) away old masks—by using them     3     (make) batteries.

First, the researchers disinfect(给......消毒)the masks, then put them into a special liquid. Next, the masks     4     (press) together and heated to 140℃, forming small conductive balls that work as the electrodes(电极)of a battery. These are separated by a layer     5     is also made of old masks, then the whole thing is put into an electrolyte (a liquid that allows electricity to pass through it) and     6     (final) covered in a protective shell. The shell is made of a different type     7     medical waste—drug blister packs.

Of course, cleaning up face masks     8     (be) only part of the issue, and it wouldn’t be much help if the batteries weren’t any good. But the team claims that they’re surprisingly     9     (success). The best—performing version of the battery continues to have 82 percent of its power after 1,500 cycles, and can deliver energy for more than 10 hours.

The team says that these batteries have a number of other     10     (benefit) too. Using waste products means they’re low—cost, and they can be made thin and flexible.