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]: Expansion of high carbon projects such as the proposed Keystone XL tar sands pipeline will undermine the good work being done in local communities across the country to fight climate change and reduce our dependence on oil.
[EX A]: agrees

[EX Q]: They are on the verge of passing climate legislation at home and a global carbon accord at the Copenhagen talks.
[EX A]: neutral

[EX Q]: The U.S. going back to the stone age will not do anything to stop global warming.
[EX A]:
neutral