California

Raft of new regulations designed to make it easier for businesses to install renewable energy technologies

Manufacturer says $250,000 superfast devices will allow its Model S sedan customers to recharge for free

Air Resources Board stages mock trial of carbon trading auction ahead of November launch

Draft proposals for state's emissions trading scheme raise possibility of cross-border sharing of allowances and credits

New regulations to slash emissions and deliver 1.4 million electric and hybrid cars on to the roads

Innovative energy data initiative to help drive efficiency gains

Sustainable Winegrowing Alliance trialling measures to help wineries record and communicate their environmental impacts

Search giant reveals annual investment in clean energy is approaching $900m

Air Resources Board votes to streamline Low Carbon Fuel Standard but oil companies warn new rules are unfeasible