Sony vows to use 100 percent renewable electricity by 2040
It'll join Facebook, Google and Microsoft in the RE100 club.
California lawmakers pass bill to phase out fossil fuels by 2045
72 percent of residents support the state's switch to fully green energy.
Facebook aims to power its operations with renewable energy by 2021
It also wants to reduce its greenhouse gas emissions.
Liquid metal battery could lower cost of storing renewable energy
It could be key to spreading the adoption of solar and wind power.
Apple announces $300 million fund for clean energy in China
The plan is to connect its suppliers with renewable energy sources.
California to require solar panels on most new homes
It's the first state where the renewable energy is mandatory.
Google wants the Clean Power Plan to stick around too
It has submitted a formal response to the EPA in support of the Obama-era law.
Google uses wind and solar to offset all of its operational energy use
It has contracts to purchase three gigawatts of renewable energy.
SoftBank and Saudi Arabia to build world's biggest solar farm
The project could cost an eye-watering $200 billion.