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EPA plans to cut coal emissions; Apple kicks off WWDC; How much for lunch with Warren Buffett?

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The Environmental Protection Agency is expected to unveil a proposal later today mandating U.S. power plants cut greenhouse-gas emissions by 30% from 2005 levels by 2030. The rule will impact the more than 600 coal-fired power plants in the U.S, and could lead hundreds of plant closures over time. The new EPA regulations are a part of President Obama's climate change initiative. The U.S. Chamber of Commerce says the rule could reduce the country’s GDP by $50 billion a year.

The Yahoo Finance team will be watching Apple (AAPL) shares today. The company's Worldwide Developer Conference begins today in San Francisco. The keynote event, which begins at 10am PT, will be streamed live, leading some observers to predict that Apple will reveal something big at the usually-closed presentation, like a health and wellness applications, or as the Financial Times reported last week, a connected-home software platform to control things like lights and the thermostat. The conference comes ahead of the Apple's 7-for-1 stock split which takes effect after the close on Friday.

A power lunch with Warren Buffett is very expensive. Bidding to win his 15th annual charity lunch began Friday with an opening bid of $25,000. This morning, bidding topped $350,000. In 2012, the winning bid was $3.45 million. The money goes to charity that provides assistance to the homeless. Strictly as an investment, though, is it wise one, or is it more about being able to say, "I ate lunch with Warren Buffet?" That’s the focus of today’s poll question. Is it a wise investment to spend lots of money for a meeting with Warren Buffett? Vote in our poll, leave a comment below or on Twitter.