On May 25, Texas and Michigan moved to join several other states in requiring the natural gas drilling industry to disclose the contents of fluids used in hydraulic fracturing, also known as fracking. On the same day, two of the biggest U.S. energy companies – ExxonMobil and Chevron – defeated proposals from their shareholders calling for more disclosure of the environmental impacts and risks of drilling for natural gas. Despite such industry resistance, fracking disclosure continues to gain traction as an issue, especially at the state level.