I want to know the answer to the following question:
What worsened the situation at the end of 2012?
All the background I'm provided with is that "Further problems hampered the Arctic project after the commencement of drilling in 2012, as Shell dealt with a series of issues that involved air permits, Coast Guard certification of a marine vessel and severe damage to essential oil-spill equipment.". Is that enough to answer the question?
Answer: no