1. Between 2000 and 2012, $1.7 trillion in damage was caused by natural disasters
2. If our seas weren't seriously polluted, fish and other marine creatures wouldn't die everyday
3. As soon as we visit the Emancipation Park, we will go to have some drinks in that famous bar.
4. By the time They invited me to travel to Los Angeles with them, I had planned my trip to England.
5. Many educational posters were displayed on the street by the local government to encourage people to protect the environment.