By the End of 2012,atmospheric Greenhouse Gases Had Again Reached

question 21

Multiple Choice

By the end of 2012,atmospheric greenhouse gases had again reached new highs-the highest levels in 800,000 years.In the twentieth century,average world temperature rose by 0.7°C.If current trends continue,scientists expect that the average range of temperature increase by the year 2100 will be

• A) 0.5-0.7°C.
• B) 0.7-1.0°C.
• C) 0.8-1.8°C.
• D) 1.0-2.0°C.
• E) 1.8-4.0°C.

---

Definitions:

Puerto Rican

Pertaining to the people, culture, or island of Puerto Rico, a territory of the United States.

AIDS

Acquired Immunodeficiency Syndrome, a chronic, potentially life-threatening condition caused by the human immunodeficiency virus (HIV) which damages the immune system.

Prenatal Exposure

The exposure of a developing fetus to substances, conditions, or influences while in the womb, which may affect health outcomes.

Opiates

A group of drugs, derived from the opium poppy, used to treat pain by mimicking the body’s pain-relieving chemicals, but can also lead to dependency.