Medi Bastoni, a 43-year-old father of four from Indonesia, is walking 800 km from his home on a volcano in East Java to Jakarta. He is doing it _________ in the hope of drawing attention to the archipelago’s (多岛屿的) quickly _________ forests.

He set out on his _________, backward journey in mid-July, with the _________ of reaching the capital by August 16, a day before the Southeast Asian nation’s independence day anniversary. He just took a short break when he was _________. “Of course I’m exhausted, but I’m ___________ to do this to fight for the next generation and I just make my _________ to do it,” Bastoni said. “My home is ___________ all of its trees so I have to do something. I can _________ the pain and tiredness.”

Bastoni says that when he arrives, he hopes to __________ President Joko Widodo and highlight the ____________ of deforestation (滥伐森林) across the archipelago, __________ at his home on Mt Wilis, a dead volcano. Indonesia __________ from one of the high rates of deforestation in the world, according to Greenpeace. Bastoni __________ 20 to 30 km backwards every day under the sun, with a rear-view mirror (后视镜) __________ to his backpack to avoid bumping into objects. Along the way, supporters cheer him on, __________ him meals or a place to stay overnight. But in order to stay ____________, Bastoni always leaves at dawn.

“Walking backwards is meant as a __________ to Indonesians to reflect on the __________ and remember how national heroes __________ for the good of the country,” he said.

Boyan Slat is 26. If you saw him walking down the street, you might think he was just a student at a local technical university. And so he was, seven years ago, right before he ________ out of college.

Slat’s life began to ________ after a holiday trip to Greece with his family when he was 16. Before taking a diving course, he had ________ to see beautiful sea animals. However, what he ________ saw in the ocean was an awful lot of plastic waste. From that moment on, Slat dived into a ________ to find a solution to this alarming problem. ________ by the idea for a floating barrier that could collect plastic in the ocean, he ________ his company at the age of 18. The idea was named one of the best ________ of 2015 by Time magazine.

After five and a half years’ hard work, he launched the world’s first ocean plastic clean-up system: System 001. The U-shaped pipe, about 609 metres in ________, snakes its way out under the Golden Gate Bridge into the Pacific Ocean. These floating barriers will capture (捕获) plastic as the ocean water flows past. Ships will collect the waste and bring it to land for ________ every few months. According to Slat, if all goes according to plan, only 60 systems could ________ the amount of plastic there by as much as 50 per cent by 2025.

________, there remains a problem: What will happen to the plastic brought back to shore from Slat’s systems? It’s likely that lots of the waste will ________ be recycled into more single-use plastics that end up back in the

________. That doesn’t mean Slat will ________. “Big problems require big solutions,” he says. “If anyone has any better ideas, I’d love to know.”

I was 10 when flooding displaced my family from the Butaleja District of eastern Uganda in 2008. Illegal sand mining along the riverbanks_______flooding already caused by climate change. We_______ our farm and home, so we moved over 130 miles away to Kampala, Uganda’s capital city, where we lived with my______. But her home quickly became______, so we moved to a one-room rental (租赁)—much______and less beautiful than our old home. It was too much for my father. My mother raised my siblings (兄弟姐妹) and me after he______. She often ______to find enough food or money. I can’t______how many times we went to sleep hungry because we couldn’t afford food. But back on our farm, we had______to eat.

And we still couldn’t______the impacts of climate change. I’ll never forget one night in November 2014. It began to rain, the power______, and water flooded our room. We stood outside all night. The next morning, we moved back into our grandmother’s house for four months until my mom could afford to______a new home.

Living through______flooding made me realize I had to protect the environment. In 2020, I ______ Earth Volunteers, a climate nonprofit organization currently supporting youth climate education. Knowledge is______: I believe my father wouldn’t have abandoned (抛弃) us if he had known why those floods hit in 2008, or how to respond.