TASK DEFINITION: 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.
PROBLEM: They are on the verge of passing climate legislation at home and a global carbon accord at the Copenhagen talks.

SOLUTION: neutral

PROBLEM: The global warming scare is a massive hoax.

SOLUTION: disagrees

PROBLEM: Global warming can increase snowfall by boosting the amount of moisture in the air.

SOLUTION:
agrees