Environment time

. NASA scientists have observed Earth’s surface is warming, and many of the warmest years on record have happened in the past 20 years.

. Some parts of the Earth are warming faster than others. But on average, global air temperatures near Earth's surface have gone up about 2 degrees Fahrenheit in the past 100 years. In fact, the past five years have been the warmest five years in centuries.

.There are lots of factors that contribute to Earth’s climate. However, scientists agree that Earth has been getting warmer in the past 50 to 100 years due to human activities. Link to photo