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Scientists are proposing an ingenious but as-yet-unproven way to tackle climate change: spraying sun-dimming chemicals into the Earth's atmosphere.The research by scientists at Harvard and Yale universities, published in the journal Environmental Research Letters, proposes using a technique known as stratospheric aerosol injection, which they say could cut the rate of global warming in half.The technique would involve spraying large amounts of sulfate particles into the Earth's lower stratosphere at altitudes as high as 12 miles. The scientists propose delivering the sulfates with specially designed high-altitude aircraft, balloons or large naval-style guns.Despite the technology being undeveloped and with no existing aircraft suitable for adaptation, the researchers say that "developing a new, purpose-built tanker with substantial payload capabilities would neither be technologically difficult nor prohibitively expensive."They estimate the total cost of launching a hypothetical system in 15 years' time at around .5 billion, with running costs of .25 billion a year over a 15-year period.The report does, however, acknowledge that the technique is purely hypothetical."We make no judgment about the desirability of SAI," the report states. "We simply show that a hypothetical deployment program commencing 15 years hence, while both highly uncertain and ambitious, would indeed be technically possible from an engineering perspective. It would also be remarkably inexpensive."The researchers also acknowledge potential risks: coordination between multiple countries in both hemispheres would be required, and stratospheric aerosol injection techniques could jeopardize crop yields, lead to droughts or cause extreme weather.The proposals also don't address the issue of rising greenhouse gas emissions, which are a leading cause of global warming.And despite the conviction of the report's authors, other experts were skeptical."From the point of view of climate economics, solar radiation management is still a much worse solution than greenhouse gas emissions: more costly and much more risky over the long run," said Philippe Thalmann of the école Polytechnique Fédérale de Lausanne, an expert in the economics of climate change.David Archer of the Department of Geophysical Science at the University of Chicago said, "The problem with engineering climate in this way is that it's only a temporary Band-Aid covering a problem that will persist essentially forever, actually hundreds of thousands of years for fossil fuel CO2 to finally go away naturally."It will be tempting to continue to procrastinate on cleaning up our energy system, but we'd be leaving the planet on a form of life-support. If a future generation failed to pay their climate bill they would get all of our warming all at once." 2830

SARASOTA, Fla. -- A Florida family is relieved their 4-year-old daughter is still alive days after she swallowed water in the family's swimming pool while playing with a pool noodle.Elianna Grace has been fighting an infection ever since."Were you scared?" Lacey Grace asked her daughter. "No, she wasn’t scared she was super, super, super brave!"Even after Elianna was hooked up to IVs, oxygen tanks and a nebulizer this week, fighting an infection caused by the chemicals in her family pool."It was just a fun game. You know, when somebody would go by her or swim by her she would take the noodle and pretend like she wasn’t looking and she would shoot water at them," said Grace. "Then somebody wanted to do it back to her and didn’t realize that she was already on the other end of it."Water was blown down her throat. She threw it up right away and started acting normal."I wouldn’t have known about it if that one person didn’t write that story," said Grace, referring to the story about a 4-year-old Texas boy who died last year after dry drowning.Lacey recalled that article right after the incident. Two days later, Elianna developed a fever and by the next day her skin had turned purple. She knew something was wrong."I called my husband and I was crying and I said you know they said to get her to the nearest ER as quick as you can," said Grace.The water at some point seeped into Elianna's lungs and she was slowly dry drowning. Grace says because of this little boy's parents and their story, her daughter is alive."Being a mom is hard work, but I read every article I can as much as I can about being a parent just to be ready if something like this happens," Grace said.She encourages other parents to do the same. 1754

SANTEE, Calif. (KGTV) -- Schools in the Grossmont Union High School District reopened for in-person learning Tuesday, allowing students back on campuses for the first time since the onset of the COVID-19 pandemic in March.A large number of students began in-class instruction on Tuesday, but there were many others who chose to remain at home for distance learning.ABC 10News was at Santana High School in Santee on Tuesday morning as students with masks on trickled onto campus. Each student underwent a health screening before heading into their classrooms.Under the district’s blended learning plan, reopening campuses to a limited number of students is step 2 out of 5. Each school will only have 25 percent of students on their campuses. These students have been split up into different groups A-D depending on factors like their course schedule.RELATED: In-person learning to resume for some in the Grossmont Union High School DistrictThe groups determine which day the students will come to school. Each group will attend in-person learning once a week; the rest of the time they’ll be learning from home. Class sizes will be made up of 8 to 12 students.GUHSD Superintendent Theresa Kemper said it took a lot of organization and brainstorming to make the plan work, making sure they followed the state COVID-19 guidelines while juggling the daily campus routines.Kemper “At the secondary level, you have students traveling to multiple classrooms, and so it took a lot of work in how to break them up in groups so we can have the hybrid model."As for the full-time distance learners, Kemper said they will continue on with their schedule as planned until they can fully reopen their schools.Kemper also added that the district will see how things will go in terms of in-person learning and they’ll continue monitoring the state COVID-19 numbers as they figure out the next step in their reopening plans. 1917

SANTEE, Calif. (KGTV) -- A woman who escaped from the Las Colinas Detention and Reentry Facility in Santee in early April pleaded not guilty Monday. 22-year-old Destiny Guns pleaded not guilty to six charges related to the escape. Guns was the first woman ever to escape from the Santee Jail, deputies say. RELATED: Woman who escaped from Las Colinas jail in Santee recapturedThe escape was reported on April 6 after Guns underwent a medical exam. Guns reportedly climbed over several fences and walls during the escape. Her clothes were found in an open field near the jail and police dogs traced her to the back of a shopping center before losing her trail. Guns was first arrested on April 1 for possession of a stolen car. She was recaptured on April 11. Details on where she was spotted are still unclear. 819

SAN RAMON, Calif. (AP) — Apple is introducing a cheaper version of its smartwatch, its latest attempt to broaden the appeal of its trend-setting products while more consumers are forced to scrimp during ongoing fallout from the pandemic. The scaled-down Apple Watch follows a budget iPhone that came out five months ago as the pandemic caused unemployment rates to soar. Apple took the wraps off the new discount watch in addition to a new high-end model, a next-generation iPad and a new subscription service during a virtual event held Tuesday. The company normally also rolls out its new iPhones at this time of year, but production problems caused by the pandemic have delayed their release until at least October, the Associated Press reports.CEO Tim Cook didn’t mention iPhones during Tuesday’s one-hour presentation recorded at the company’s massive, but now mostly empty, headquarters in Cupertino, California.The Apple Watch has never come close to rivaling the iPhone’s popularity, but it does dominate the market for smartwatches.The new discount model, called the Apple Watch SE, will sell for 9 and be available beginning Friday. The price is a markdown from the 9 that Apple is asking for the next version of its higher end watch, the Series 6.Apple added more features to help the watch monitor its owner’s health, including a sensor that can read blood oxygen levels. The feature, specific to the Series 6, could be timely, given that COVID-19 frequently attacks the lungs.Apple also announced a new fitness subscription service tailored for its watches for per month, as well as a new option that will bundle its existing music, video, news and gaming services into a package that will cost to per month. 1747