Senate Bill 100 requires the state to get its energy from clean sources such as solar, wind and hydropower, and eliminate fossil fuels from its electric grid.
Starting Wednesday, government and industry officials and climate activists will gather in San Francisco for the Global Climate Action Summit.
"We are going to meet the Paris agreement and we're going to continue down that path to transition our economy to zero carbon emissions", Brown said.
Read the full story here. Between 2008 and 2015, the price utilities paid for solar energy dropped 77 percent. In addition, the order sets a goal of maintaining "net negative emissions" beyond 2045, which means using plants or technology to draw carbon dioxide out of the atmosphere, and reuse or store it some manner (see "Maybe we can afford to suck CO2 out of the sky after all").
California has dramatically stepped up its climate-change policies four times in the last four years, as Capital Public Radio's Ben Bradford reported last month. By 2030, 60% of the total energy required must come from renewable resources, and by 2045, state legislature hopes to have achieved a 100% renewable power use.
In a signing message for SB 100, Brown said the bill "sends a clear signal to markets to expand clean energy generation".
To support energy storage deployments and greenhouse-gas reduction goals, two additional energy storage bills that complement SB 100 await Governor Brown's signature.
11 dead, 44 in hospital after motorist attacks crowd in China
China has experienced violent attacks in public places in recent years, including bombings and arson of buses and buildings. Three attackers also died in the incident, which Beijing blamed on separatists from the restive western region of Xinjiang.
Experts say that while a goal of having 100% renewable energy by 2050 is an important one to strive for, there is some concern as to whether it is attainable.
The nation's largest state now gets just over one-third of its energy from wind, solar or geothermal power, according to the U.S. Energy Information Administration.
An executive order signed by Brown on Monday directs the state to achieve "carbon neutrality" by no later than 2045.
"California must take a stand and tell the world we are, as always, undeterred by those who wish to stop our progress and move backwards", Schwarzenegger wrote.
While 32% of commercial energy sale previous year was purchased from renewable sources, one glaring problem California faces is having the overall energy supply matchup with overall demand for electricity. De León said the legislation was a "labor of love".
Major cities will likely announce greenhouse gas emissions trending downward, and governors will unveil partnerships supporting indigenous efforts to sustainably manage tropical, carbon-dense forests. California is the second state to pledge to make their energy carbon-free, the first being Hawaii.