California

Walmart to pay $81m as part of the plea after admitting dumping pollutants from stores into drains in 16 California counties

Jerry Brown says two markets could link up from January next year

City power company to replace electricity supply with renewables, energy efficiency, and natural gas

CO2 permits for 2013 clear $2.91 above floor price, as EU committee again discusses propping up ailing Emissions Trading System

Grocery retailer makes a daring move by choosing to sell produce below the industry's cosmetic standards.

Supporters hope state-wide cap-and-trade scheme could provide a model for the rest of the country

Sage of Omaha agrees to pay between $2bn and $2.5bn for SunPower’s 579MW Antelope Valley projects

Sony Pictures Studios, formerly MGM, switches to fleet to cleaner trucks

But tradable allowances barely clear $10 floor price

But Air Resources Board still plans to launch cap-and-trade auction today