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]: Exxonmobil has spent at least $8 million dollars funding a network of groups to challenge the existence of global warming.
[EX A]: neutral

[EX Q]: Global warming will harm Americans.
[EX A]: agrees

[EX Q]: We now have 380 parts per million of carbon dioxide in the atmosphere.
[EX A]:
neutral