Scientists have found that atmospheric carbon dioxide levels have(1 point)

Question

Responses

increased from 280 parts per million to over 400 parts per million during the last 150 years.
increased from 280 parts per million to over 400 parts per million during the last 150 years.

decreased from 400 parts per million to 280 parts per million during the last 200 years.
decreased from 400 parts per million to 280 parts per million during the last 200 years.

increased from 50 parts per million to over 100 parts per million during the last 150 years.
increased from 50 parts per million to over 100 parts per million during the last 150 years.

decreased from 280 parts per million to 100 parts per million during the last 150 years.
decreased from 280 parts per million to 100 parts per million during the last 150 years.
Question 2
Which agricultural practice result in methane emission?(1 point)
Responses

clearing land for farms
clearing land for farms

manure management techniques
manure management techniques

refrigeration
refrigeration

none of the above
none of the above
Question 3
Which of the following is the main cause of increased burning of fossil fuels?(1 point)
Responses

new types of energy production
new types of energy production

agricultural innovations
agricultural innovations

economic and population growth
economic and population growth

advancements in technology

Answer 1

Here are the responses to your questions:

Question 1: Scientists have found that atmospheric carbon dioxide levels have
Correct Response: increased from 280 parts per million to over 400 parts per million during the last 150 years.

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Question 2: Which agricultural practice results in methane emission?
Correct Response: manure management techniques

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Question 3: Which of the following is the main cause of increased burning of fossil fuels?
Correct Response: economic and population growth

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If you have more questions or need further clarification, feel free to ask!