Complex sentence: The cauldron proper is in the form of a pot; as part of the organizers' focus on preventing global warming, it was designed to have low emissions and produce a smaller volume of flame than previous cauldrons.
Split into simpler sentences: The cauldron proper was in the form of a pot, as part of the organizers' focus to reduce the effects of global warming. It was designed to have low emissions and produce a smaller volume of flame than previous cauldrons.