Answer the following question given this paragraph: Since the mid 1800s, Earth has warmed up quickly. Look at Figure below . The 14 hottest years on record have all occurred since 1900. Eight of them have occurred since 1998! This is what is usually meant by global warming . Q: Eight of the hottest years on record have occurred since what year? A:
pick from the following. A. 2002 B. 1997 C. 1991 D. 1998
D.