又发新威胁，美国关税乱拳打疼了谁

Group 1 - The U.S. government has announced a 50% tariff on imported copper, effective from August 1, citing national security concerns and the need to rebuild the domestic copper industry [1][5][7] - Copper is a critical metal used in various industries, including electronics, construction, and automotive, with nearly half of U.S. copper procurement relying on foreign suppliers [2][7] - The decision to impose tariffs on copper comes after a 270-day investigation under Section 232 of the Trade Expansion Act, which was initiated in February [2][7] Group 2 - In addition to copper tariffs, the U.S. may impose new tariffs of up to 200% on foreign-manufactured pharmaceuticals, although these tariffs may not take effect for another year to a year and a half [9][12] - The pharmaceutical industry has expressed concerns that such tariffs could lead to increased drug prices in the U.S., as approximately 70% of finished drugs are imported, and over 30% of raw materials are also sourced from abroad [14][23] - The ongoing tariff discussions reflect a broader trend of uncertainty in U.S. trade policy, which has been characterized by frequent changes and a lack of clear strategic direction [16][19] Group 3 - The United Nations Conference on Trade and Development has warned that U.S. trade policies could lead to increased global trade fragmentation and instability in supply chains, potentially harming the world economy [20][23] - The uncertainty surrounding U.S. tariffs is expected to have negative long-term effects on the U.S. economy and its relationships with major trading partners, with no clear winners emerging from the situation [23]