And this war has also disrupted the flow of liquefied natural gas from Qatar, which controls almost 20% of the global market. That also affects the world economy and supply chains. And shortages of natural gas affect production of fertilizer and aluminium, as well as other key materials.
份额方面，油气ETF汇添富最新份额达29.17亿份，创近1年新高，位居可比基金1/3。（数据来源：Wind）
，这一点在新收录的资料中也有详细论述
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# If past the range, then we can use the half angle transformation to account for error