While government, energy, tech and banking leaders held a summit, protestors warned of worsening climate pollution and a future shaped by “the worst people on Earth.”By Marianne Lavelle, Kiley BensePITTSBURGH—Flanked by titans of the fossil fuel, tech and finance industries, President Donald Trump on Tuesday hailed $90 billion in private investments aimed at building a massive artificial intelligence hub around Pennsylvania’s natural gas resources.

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