Flood walls protect us from the danger and damage from floods. Floods are a very dangerous natural disaster; they can affect human lives and put humans in danger. Flooding can also affect the environment...

If we used solar-panel public transportation, it would be very healthy for the environment. We also need more public transportation for young people who need to travel and for people who don't have cars....

We need a better battleship because of the growing tension in Europe and East Asia. Tension between the USA and China is growing each day, with China wanting to invade Taiwan. The USA and Taiwan are allies....