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Prenatal exposure to ambient air pollution was associated with an increased risk of autism spectrum disorder, a new study finds. Pregnant women in Vancouver who were exposed to the highest level of environmental nitric oxide, an airborne, traffic-related pollutant, were more likely to give birth to children later diagnosed with autism, the researchers say.Autism spectrum disorder, a developmental disability, is characterized by problems with communication and social interaction with accompanying repetitive behavior patterns.Lief Pagalan, lead author of the study and a member of the faculty of health sciences at Simon Fraser University, cautions that the study, published Monday in the medical journal JAMA Pediatrics, showed only an association between prenatal exposure to nitric oxide and autism rates. It did not prove that air pollution caused autism.Experts emphasize that the exact causes of autism remain unknown, and some say the researchers in this study did not analyze every potential risk factor.Still, the research "adds to the growing concern that there may be no safe levels of exposure to air pollution," Pagalan wrote in an email."Not only did we have access to rich data, enabling us to develop one of the largest studies to date, but we were also able to conduct this study in a city with relatively lower levels of air pollution," he said. 1375

PORTLAND, Ore. — The mayor of Portland, Oregon, was tear gassed by federal agents late Wednesday as he stood with protesters at a fence guarding a federal courthouse. Mayor Ted Wheeler said it was the first time he'd been tear gassed and appeared slightly dazed and coughed as he put on a pair of goggles someone handed him. Earlier in the night, Wheeler was jeered as he tried to rally demonstrators who have clashed nightly with federal agents sent in by President Donald Trump to quell ongoing unrest in the city. "I think it's important for me as the mayor and the police commissioner to be out here where people are demonstrating, hear their concerns, not only about the federal government, but also about our local (government)," Wheeler said.Though Wheeler stood in solidarity with protesters on Wednesday night, he's faced criticism from protesters from deploying similar tactics against demonstrators prior to the arrival of federal agents.Wheeler was among 13 mayors of major U.S. cities to sign an open letter to the Trump administration Wednesday, asking that federal agents not be sent to deter crime. Federal agents have been occupying Portland since last week in support of an executive order President Donald Trump signed earlier this year to protect federal monuments and statues.According to KOIN-TV in Portland, Wednesday night marked the 55th straight night of protests against police brutality in the city. 1435

President Donald Trump once again went after Michigan Gov. Gretchen Whitmer on Thursday morning during an interview on Fox Business.Trump made the comments while criticizing states who he believed had not lifted COVID-19 restrictions quickly enough."(Whitmer) wants to be a dictator in Michigan, and they can't stand her," Trump said.He added that the believed people in Michigan wanted to get back to work.Trump and Whitmer have sparred in the media for months. 470

President Donald Trump said Monday he would have stormed into the Florida high school to stop the gunman perpetrating the nation's latest mass shooting "even if I didn't have a weapon" as he lambasted the inaction of a sheriff's deputy assigned to the school."I really believe I'd run in there, even if I didn't have a weapon, and I think most of the people in this room would have done that too," Trump told a gathering of US governors at the White House.Signaling more than one sheriff's deputy was at fault, Trump said they "weren't exactly Medal of Honor winners" and said "the way they performed was frankly disgusting."  639

POWAY, Calif. (KGTV) -- Residents and businesses in Poway were notified Friday they have clean water after a boil water advisory was issued nearly a week ago.Testing was conducted on Poway’s water supply and samples were sent to be examined by state officials.City officials said the first test on the water, requested by the state, came back clean Thursday night. A second test Friday showed the water was safe.RELATED COVERAGE:-- Poway could face fines as water boil advisory continues-- Poway boil water advisory continues despite positive tests-- Poway Unified School District sends parents action plan after water boil advisory issuedPoway has been under a boil water advisory since Nov. 30 after numerous residents reported brownish water coming out of faucets the day before.The city’s Public Works Department said it secured the stormwater outlet on Dec. 1 to eliminate any future backflow.The affected section of Clearwell Reservoir was disinfected and refilled earlier this week, the city said.The water issue had a negative impact on businesses, especially some Poway restaurants which had to shut down. The order also forced may residents and businesses to rely on bottled water, which the city provided daily.As residents and businesses return to normal, the city reminded everyone to flush water pipes by running water until its clear, do not use water if it is discolored, replace any water filters and flush water dispensers, and for businesses to sanitize all machines they may utilize tap water and all fixtures, sinks, dishes and utensils.Businesses that have any concerns can also call the Department of Environmental Health at 858-565-5255. 1669

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