Together the cities include about 54 million people.
The star-studded conference included a rousing call to action by Harrison Ford, who implored the audience to protect forests, fisheries and other natural wonders.
At a signing ceremony in the state capital Sacramento, Mr Brown vowed to meet the terms of the Paris agreement and to "continue down that path to transition our economy to zero carbon emissions".
"This is the climate action summit, emphasis on the action", Purvis said.
Members of the group 1000 Grandmothers protest outside the Moscone Center in San Francisco where the Global Climate Action Summit is being held, on Thursday, Sept. 13, 2018. Going green is a must. He said he was willing to negotiate a new climate change agreement.
Giuseppe Sala, the mayor of Milan, Italy, talked up plans to reduce waste from food and other sources.
"But really a lot of actions are happening at the local level, and so I think it's really important at all levels and at the very least mayors and governors are doing their job".
Apart from the climate front, governments across the world have also been criticizing the Trump administration for withdrawing the United States from the 2015 Iran nuclear deal and for threatening to punish foreign governments that don't cut imports of Iranian oil to "zero" by Nov 4.
In closing remarks, United Nations climate chief Patricia Espinosa also called for a new era of climate diplomacy that includes not just national governments but also cities and regional bodies as well as industries - an approach she dubbed "inclusive multilateralism".
In a speech, he called the conference a way to broadcast that the U.S.is still committed to fighting global warming.
The three-day GCAS attracted more than 4,500 representatives from leaders of governments and businesses, regions, cities, investors and civil organizations on topics of climate change that impacts hugely on the future of both the globe and human existence.
She shrugged off U.S. President Donald Trump's contentious policy on climate change and global warming, as the U.S. administration decided previous year to pull out of the landmark Paris Agreement that committed all states across the globe to take joint actions on climate challenge.
Xie reaffirmed China's commitment to the goal set forth in the Paris Agreement by making tangible contributions to the global fight against climate change.
Bloomberg and Brown, a Democrat, said they calculate the country is within striking distance of the reduction in greenhouse gases previously promised by the U.S.
Trump announced previous year that he was withdrawing from the l climate accord.
His administration is also seeking to boost methane emissions and roll back California's strict vehicle emissions standards.
In response to a question Thursday at a news briefing, Brown said Trump will likely be remembered poorly when it comes to the environment.
"To me, Gov. Brown is a climate hero", said Todd Stern, the head USA climate negotiator in Paris.
Brown suggested that one of the solutions to climate change is to develop the new economy.
CEO Marc Benioff announced that Salesforce and 20 technology companies have signed a pact to "decarbonize" by reducing greenhouse gas emissions worldwide through supply chains, regulations and customer efforts.
The governor's office says it will collaborate with Planet Labs, a company that specializes in satellite imaging and manufacturing.
Bloomberg chimed in: "America's a wonderful country".
The death toll rose to at least 16 in North and SC , where roads were treacherous and even the most stately trees were falling. The three-month-old child died when a large pine tree fell across a mobile home in Gaston County, North Carolina, police said.
Brent crude LCOc1 however pulled back on the reports of additional tariffs, dropping 5 cents a barrel to $78.12 by 1:03 p.m. Iran supplied 18.4 million tonnes of crude oil during April 2017 and January 2018 (first 10 months of 2017-18 fiscal).
East Coast, according to the National Weather Service, and another 4 million people were under a tropical storm watch. Florence is still a Category 4 hurricane and is expected to regain its top wind strength in the next day or so.
Durbin, D-Ill., said Ford needs to be heard but argued that it would be "too fast" for her to appear on Capitol Hill this week. Mrs Ford, a professor of psychology at Palo Alto University, detailed her allegations in the Washington Post at the weekend .
While Golovkin appeared to take issue with the result, there was little sense of controversy about Saturday's outcome. Judge Glenn Feldman scored the fight 114-114, and judges Steve Weisfeld and Dave Moretti had it 115-113 for Canelo.
Mayor Beach Mayor Brenda Bethune told CNN traffic out of the SC city has more than quadrupled as residents and visitors evacuate. Myrtle Beach, a SC beach resort, was virtually deserted with empty streets, boarded up storefronts and very little traffic.
Of course, we're talking about mid-range Samsung smartphones, which usually don't get confirmed for major Android OS updates. Samsung sent out invitations on Friday (Sep 14) for an Oct 11 event to launch a new mobile device under its Galaxy line.
But in the melee there was something cool that we checked out - the new Apple Watch 4 faces that are coming with the new device. The phone will also dispense with 3-D touch, which may or may not make much of a difference with most iPhone users.
One other perk: The iPhone XR will be available in a variety of colors including black, red, white, blue, coral and yellow. There's also Dual-SIM support but for those outside of China would need to use an e-SIM for the secondary connection.
OnePlus CEO Explains Why His Company Is Making a TV
Lau is best known now as the head of a cell phone company, but he has a home electronics and video background. The One Plus CEO claims that the company wants the whole community to be involved in shaping the OnePlus TV .
$2.5M bond for Border Patrol agent in killings
She was found not far from where the previous body was discovered and she later died at a hospital from fatal head trauma. The victims in the Ortiz case were killed or left for dead in rural parts of Webb County, which borders the Rio Grande.
NC Officials Evacuated Prisoners In Storm Areas; SC Did Not
Risky storm surges and rising tides have caused coastal areas to be flooded, with water rushing inland from the shoreline. Sooner or later, a volunteer rescue team that had arrived in North Carolina from in came with a ship and rescued them.
Hurricane Florence: Carolinas brace for 'storm of lifetime'
On the side streets, inside of residential areas, there were few signs that anyone had chose to stay behind to wait the storm out. More than 80,000 people were already without power as the storm began buffeting the coast, and more than 12,000 were in shelters.
Hurricane Florence Approach Swamps North And South Carolina
She said 61 shelters had opened thus far, including 12 that are specially outfitted to help people with special medical needs. By Friday evening, Florence was downgraded to a tropical storm, its winds weakening to 70 miles per hour as it pushed inland.
5 teams who could take the risk and bring in Josh Gordon
Gordon clearly wants to be a Jag, but the real question is if they want him too? He did not play in either 2015 or 2016. Others were perplexed, wondering why the Browns would cut Gordon now after sticking with him for so many years.
SpaceX to reveal plans, passenger for private moon mission
Instead, Musk claimed that SpaceX had turned its attention to the BFR after deeming it to be a better fit for tourist missions. Falcon Heavy's flight was delayed to February of this year and the Dragon capsule is still under development for passengers.