Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: The plan, jointly published by the Environmental Protection Agency and the Transportation Department, would roll back a 2012 rule that required automakers to nearly double the fuel economy of passenger vehicles to an average of about 54 miles per gallon by 2025. It would halt requirements that automakers build cleaner, more fuel-efficient cars including hybrids and electric vehicles. 
  
 That Obama-era rule, which aimed to cut the nation’s greenhouse gas emissions while reducing oil consumption, was opposed by automakers who said it was overly burdensome. However, Thursday’s proposal goes much further than many major automakers wanted, and manufacturers are now worried that years of legal challenges and regulatory uncertainty could complicate their business. 
  
 The governor of California, Jerry Brown, said his state was prepared to fight. “For Trump to now destroy a law first enacted at the request of Ronald Reagan five decades ago is a betrayal and an assault on the health of Americans everywhere,” he said. 
  
 In a statement titled “Make Cars Great Again” that was published Thursday on The Wall Street Journal’s website, Transportation Secretary Elaine L. Chao and Andrew Wheeler, the acting administrator of the E.P.A., wrote that the Obama-era standards would “impose significant costs on American consumers and eliminate jobs.” Their new proposal, they said, would “give consumers greater access to safer, more affordable vehicles, while continuing to protect the environment.” 
  
 Their proposal would freeze the increase of average fuel economy standards after 2021 at about 37 miles per gallon. It would also revoke a legal waiver, granted to California under the 1970 Clean Air Act and now followed by 13 other states, that lets those states set pollution standards that are more stringent than the federal government’s. ||||| Focused crawls are collections of frequently-updated webcrawl data from narrow (as opposed to broad or wide) web crawls, often focused on a single domain or subdomain. ||||| The Trump administration on Thursday revealed its long-anticipated plan to roll back Obama-era standards meant to cut planet-warming emissions from tailpipes and boost fuel efficiency in cars and trucks sold in the United States in the coming years. 
  
 At the same time, the administration confirmed it will seek to strip California of its special authority to set its own fuel economy levels for autos, escalating a legal battle with more than a dozen states. Shortly after the announcement, 19 states and Washington D.C. said they intended to sue over the revision. 
  
 The National Highway Transportation Safety Administration and Environmental Protection Agency say they intend to reverse ambitious targets for fuel economy and emissions reductions, which the agencies developed under President Barack Obama. Instead of requiring automakers to steadily increase the average fuel efficiency of passenger vehicles through 2025 as previously planned, the Trump administration would freeze those levels after 2020. 
  
 That would mean the fleet of cars and light-duty trucks that automakers release each year will only have to average about 37 mpg by 2026, rather than targets near 50 mpg envisioned by the Obama administration. Those fleets would also be allowed to emit more greenhouse gases for each mile driven under the Trump plan. 
  
 To be sure, those are simple, round numbers that mask the complicated formulas behind the standards, known as Corporate Average Fuel Economy, or CAFE. But put simply, the Trump administration is trying to ease regulatory burdens for American automakers, even though the industry sought less drastic changes to the CAFE standards. 
  
 The proposal would lower the hurdles that automakers face in meeting tougher standards, especially as demand for trucks and large, less fuel efficient vehicles remains healthy. However, the administration's decision to revoke California's special status opens a path to an outcome the industry has long tried to avoid: having to engineer cars and trucks for two different sets of fuel economy standards in the United States. 
  
 California, along with 16 other states and Washington D.C., sued the Environmental Protection Agency in May after the administration said it would lower the Obama-era standards. The federal government has long issued California a waiver so it can combat pollution levels that are higher than in the rest of the country. 
  
 "Federal rules to limit tailpipe pollution and improve fuel economy are our best strategy to reduce carbon pollution, improve air quality, and save drivers money on gas," the 20 attorneys general that intend to sue said in a statement on Thursday. "The Administration's proposal to weaken these rules will cause the American people to breathe dirtier air and pay higher prices at the pump." 
  
 The CAFE standards stretch back to the 1970s and were designed to cut fuel consumption and bolster U.S. energy security in the wake of the Arab Oil Embargo. The Obama administration accelerated efforts to boost fuel economy and integrated that push with a new focus on cutting planet-warming emissions. 
  
 Automakers got on board with more aggressive mpg targets after being bailed out by Washington in the wake of the global financial crisis nearly a decade ago. 
  
 However, Americans have not gravitated toward fuel efficient cars, electric vehicles and hybrids as much as anticipated. That means automakers have to achieve better fuel economy by improving the fossil-fuel engines and by designing lighter and more aerodynamic models, said Carla Bailo, president and CEO of the Center for Automotive Research. 
  
 "It would have really created quite a strain," she said. 
  
 The Trump administration argues that the industry has picked the low-hanging fruit when it comes to technology improvements. Consequently, finding ways to squeeze more mileage out of a gallon of gasoline will become increasingly expensive, it says. That threatens to raise prices for automakers and consumers alike, the administration warns. 
  
 Those claims are disputed by some analysts. Tougher standards are financially feasible through 2030, while estimates for the cost of complying with fuel economy and emissions rules are overstated by as much as 40 percent, according to the International Council on Clean Transportation, a nonprofit that provides analysis to environmental regulators. 
  
 However, consumer trends do create challenges for car manufacturers trying to hit the goals. 
  
 When oil prices are high and car buyers are focused on fuel costs, companies typically have an easier time selling the smaller, more fuel efficient cars that help them hit the fleet-wide targets. But when the price at the pump falls — as it did between 2014 and 2016 — demand typically rises for SUVs and trucks, skewing the average mpg of an automaker's fleet higher. 
  
 The Trump administration argues the Obama-era standards could leave dealers with showrooms packed with small, fuel-efficient cars that shoppers don't want. That could cause vehicle owners to keep their old trucks rather than trading up to a new model with better fuel economy and pollution control, it says. 
  
 The policy change does not necessarily mean automakers will stop improving fuel efficiency. Car companies typically try to harmonize their fleets for the global market to the best of their ability, and other parts of the world are still pushing forward policies to improve fuel economy standards and put more electric vehicles on the road. 
  
 Bailo says the lower standards will offer automakers relief in their pickup truck segments, a particularly strong business in the United States. But the manufacturers are still likely to focus on fuel economy in sedans and crossover vehicles that sell well around the world. |||||
A:
News broke in late March that the EPA was preparing to announce plans to weaken landmark fuel-efficiency goals put in place by the Obama administration, and that day has come to pass. The Trump administration on Thursday formally released its proposal, a joint effort with the EPA and Transportation Department, which would curtail an Obama-era rule that would have required vehicles to hit an average fuel economy mark of about 54mpg by 2025, a mark the administration has framed as too high and therefore problematic for manufacturers, reports the New York Times. Instead, the standard would be frozen after 2020 at roughly 37mpg, where it would remain though 2025, reports CNBC. More: