The Tenth Circuit upheld on constitutional grounds Colorado's mandate that 20% of the electricity that generators sell to Colorado consumers come from renewable sources. A conservative energy group claimed that the renewable energy standard will harm out-of-state coal producers in violation of the C...

A Colorado court upheld a city's decision to create a local electric utility. An electric company argued that the city council exceeded its authority when it created the utility. But the company missed the 28-day deadline for challenging quasi-judicial decisions. When the city declared that the cond...

The Supreme Court of Oklahoma held that a woman injured in a 2011 earthquake may go forward with her suit against two energy companies for allegedly causing the quake due to hydraulic fracturing operations. A lower court dismissed the case, concluding that the Oklahoma Corporation Commission has exc...

A Washington court ordered the state's environmental agency to reconsider its denial of youths' petition asking the agency to adopt rulemaking to limit greenhouse gas (GHG) emissions in accordance with the best available science. The youths had also petitioned the agency to recommend to the state le...