Update at 9: 15. m.
The University of California has set an ambitious goal to rely entirely on zero.
By 2045, it will emit energy for its electricity. Gov.
Jerry Brown signed a bill on Monday to set a target for electricity use.
He also issued an executive order calling for carbon neutral in the state
It means California "emits as much carbon dioxide as possible from the atmosphere"
To the same year.
"The bill and executive order put California on the path to achieving Paris and other regional goals," Brown said in a statement . ".
"It's not easy.
It will not happen immediately.
But this must be done.
"With the Trump administration withdrawing the federal government's efforts to tackle climate change, California is actively playing a leading role in the international fight against global warming.
Shortly before Brown went to San Francisco to attend the Global Climate Action Summit, Brown announced the latest news.
The bill specifically requires that by 2025, 50% of California's electricity will be powered by renewable resources and by 60% by 2030, while calling for zero-towards 100%-
Carbon power generation by 2045. ("Zero-
Carbon sources include non-renewable nuclear energy. )
Prior to this, California had stipulated 50% renewable electricity by 2030.
California is not the first state to have such ambitions.
In 2015, Hawaii set a target of 100% renewable energy by 2045.
But, as KQED's Lauren Sommer reported last year, "California's electricity consumption is 30 times that of Hawaii, the world's fifth-largest economy.
"California has received a large portion of its electricity from renewable resources.
The California Energy Commission estimates that 32% of retail energy sales last year were driven by renewable energy.
But the supply of renewable energy is changing every day.
Even a moment to a moment.
NPR's money planet reports that on a sunny day in June, nearly 50% of the state's electricity comes from solar energy alone.
But as Somer reported last year, this variability means that it is difficult to match the supply of renewable energy to the demand for electricity: large-
Sommer says a massive energy storage system can help solve the problem, "better --
Grid-connected transmission system.
The climate in California has risen sharply.
As Ben Bradford of the Capital Public Radio reported last month, policy has changed four times over the past four years.
Before the new 100% zero-
Emissions targets, lawmakers have approved "higher renewable energy use, stricter greenhouse gas targets, and an extension of the ceiling --and-
"Trade projects," he wrote.
Bradford reported that the new bill was backed by Democrats who emphasized the damaging consequences of climate change, while state Republicans opposed it, stressing the fiscal costs of the policy.
California's utilities are on track to achieve 50% clean energy by 2030, "but scientists argue about costs --
"An efficient 100% clean energy is feasible or new technological advances are needed," Bradford wrote . ".
Some cities around the United StatesS.
100% renewable power or energy supply
Including Aspen, Colorado.
Burlington in Vt
And Georgetown, Texas.
Earlier this year, Portugal produced enough renewable energy to meet the entire demand for electricity --
Although China does rely on fossil fuels to balance the cyclical disconnect between supply and demand.