Which Substance Is of Great Concern to Scientists Studying Human-Generated

question 3

Multiple Choice

Which substance is of great concern to scientists studying human-generated greenhouse gases, and is thought to increase such that the earth's climate will be irrevocably changed by 2020?

• A)chlorofluorocarbons
• B)carbon dioxide
• C)methane
• D)nitrous oxide
• E)ozone

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Definitions:

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Persistent feelings of nervousness, worry, and fear that can affect daily functioning over a long period.

Purity Rituals

Ceremonial actions practiced in various cultures and religious traditions to achieve a state of cleanliness or purity, often involving water, incense, or other symbolic elements.

Five Pillars

The foundational principles or practices in Islam, including the declaration of faith, prayer, fasting during Ramadan, charity, and pilgrimage to Mecca.

Organ Transplantation

The surgical operation of transferring organs from a donor to a recipient to replace dysfunctional or missing organs.