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.

[EX Q]: There is no proof that global warming is caused by humans, and no proof that global warming will cause catastrophic issues for Earth.
[EX A]: disagrees

[EX Q]: Antarctica's sea ice has expanded by about half a percent a year.
[EX A]: disagrees

[EX Q]: In the long run, the costs from raising the price of fossil-fueled electricity and other sources of energy could be modest.
[EX A]:
neutral