Elon Musk admits in court that Tesla cannot produce enough Powerwall batteries because of the ongoing global chip shortage
iPhone maker wants to clean up its supply chain and promises big solar energy projects for renewables push
Search engine giant contributes $300m (£195m) to a fund to push solar panels onto residential roofs
Apple to cut energy costs at its campus and stores by using renewable power from a new solar farm
Google makes 17th major investment in renewables since 2010
IBM and others are working on a solar collector that can magnify the power of 2,000 suns for green energy
Nokia admits that solar panel ona phone's phone back cover need a lot of sun to power a phone
