The Big Island is the only Hawaiian island still growing. Witness the power of Pele, the Hawaiian goddess of fire, wind, lightning and volcanoes with a visit to the Hawaii Volcanoes National Park. It's one of the few spots in the world where you can see lava flow. In fact, the Big Island has 10 of the world's sub-climate zones, from the snow-covered mountain of Mauna Kea, green forests of Waipio Valley to stretches of barren desert.

21. Which is young couples' favorite?

　A. Oahu. B. Maui. C. Kauai. D. Big Island.

22. How is Oahu different from the other places?

　A. It belongs to Hawaii. B. It offers the best beaches.

　C. It has variety of plants. D. You can experience city life on it.

23. What do Maui and Big Island have in common?

　A. They are both covered with snow. B. You can have a look at a volcano.

　C. Weather is changeable. D. There is plenty of rain.

　　　　　　　　　　　　　　　　　B

　　Weather has always been a central part of my life. It terrified me at age four, amazed me at age 10, and got me into college at age 17. The biggest danger we face today isn't gun violence, election interference（干扰）, North Korea, or Donald Trump. It's climate change.

　　There is clear evidence that our climate is changing. The number of years with an average temperature above 50 degrees in Rochester has doubled. In the past 27 years, we've had 18 years with more than 100 inches of snowfall. In the 50 years prior, only 13 years exceeded（超出）100 inches of snowfall. Recent events are perhaps the most serious reminder that something is horribly off. Just in the past few months, dozens have died in one of the most expansive wildfire seasons on record. This year alone, six tropical systems have impacted U.S. states and territories. Four were major hurricanes and three of those four made landfall.

So what can we do? At this point, it seems like nothing will be able to prevent this planet from going to ruin. I don't have all the answers. The true solutions to these problems are years away. But that means that we're the generation that will be responsible for saving the planet. You can start right now.

If you're learning a language, you could become the bridge between several countries hoping to cooperate on sustainable solutions. If you're an engineer, why not start thinking about how you