Read the passage and find if the passage agrees, disagrees, or has a neutral stance on whether Global warming is caused by human activities. Answer only with keyword (a) agrees - if passage agrees with the target (b) disagrees - if passage disagrees with the target (c) neutral - if the given passage neither agrees nor disagrees with the target. You don't need to use external knowledge in this task, and you have to answer based on the given passage.

[Q]: A mammoth effort is needed, beginning now and carrying through the century, to decarbonize global energy systems.
[A]: agrees


[Q]: During the past 15 years, the retreat of summer sea ice has led to a 5 percent increase in the amount of energy the Arctic Ocean has taken up.
[A]: agrees


[Q]: The global warming scare is a massive hoax.
[A]:
disagrees