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The go karts have arrived at Overdrive Raceway, a indoor, electric, two-story go kart track that is under construction in northern Colorado Springs. The facility will be housed in a 68,000-square-foot building in Polaris Pointe, the retail center. Monday, April 26, 2016. (photo by Jerilee Bennett/The Gazette)
APTOPIX Berkshire Hathaway Shareholders
Berkshire Hathaway Chairman and CEO Warren Buffett tours the exhibit floor before presiding over the annual shareholders meeting Saturday, April 30, 2016, in Omaha, Neb. (AP Photo/Charlie Riedel)
Ethane Pollution
In this Feb. 25, 2015 photo, a drilling rig is seen near Epping, N.D. A team led by researchers at the University of Michigan has found that fossil fuel production at the Bakken Formation in North Dakota and Montana is emitting roughly 2 percent of the ethane detected in the Earth's atmosphere. Along with its chemical cousin methane, ethane is a hydrocarbon that is a significant component of natural gas. Once in the atmosphere, ethane reacts with sunlight to form ozone.(AP Photo/Matthew Brown)
Houston Pollution
FILE - In this June 28, 2011 file photo, an oil tanker is docked at the ExxonMobil Baytown complex along the Houston Ship Channel in Baytown, Texas. Houston's efforts to use local clean air laws to regulate pollution in the home of the nation's largest petrochemical complex were halted Friday, April 29, 2016, by a Texas Supreme Court ruling in favor of energy and chemical companies that claimed the city had overreached. The coalition made up of ExxonMobil Corp. and other companies with nearby refineries and plants had sued the nation's fourth-largest city in 2008 after Houston passed ordinances that required businesses to pay registration fees based on the number and type of pollution sources on each site. (AP Photo/David J. Phillip, File)
Oculus Launch Delays
In this Friday, April 22, 2016, photo, Christian Cantrell, a software engineer and science fiction author, poses for a photo at his high-end computer setup that an Oculus Rift camera will go with, at his home in Sterling, Va. Cantrell pre-ordered the device and is still waiting, despite the fact that the gadgets began shipping weeks earlier. (AP Photo/Pablo Martinez Monsivais)