Which of the following is TRUE of CFCs?
A) They are now banned by international treaty.
B) They have disappeared in the atmosphere.
C) They are very toxic to humans.
D) They are not able to exist for long in the atmosphere.
E) They are now the most dominant gases in the stratosphere.
Answer: A
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Which of the following proteins has an extended helix secondary structure?
A) collagen B) keratin C) silk D) none of these
All of the following are objectives of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) EXCEPT
A. requiring that the production, transport, and disposal of hazardous waste be documented. B. setting priorities for cleaning up hazardous waste sites. C. making those responsible for contaminated hazardous waste sites pay for cleanups whenever possible. D. establishing a fund to pay for the cleanup of abandoned hazardous waste sites.
Body waves can be divided into two types: primary waves and secondary waves. What is the difference between these two types of body waves?
What will be an ideal response?
The northeast trades are found between 60 degrees and 30 degrees North
Indicate whether the statement is true or false