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massive wildfires like the ones that ravaged parts of California last year burned thousands of pounds of wiring plastic pipes and building materials and leave dangerous chemicals in the air soil and water , as natural disasters fueled by climate change increase in scope and frequency scientists are worried about the toxins they leave behind Reuters correspondent Sharon burns team %HESITATION twenty seven thousand people lived in the town of paradise which was completely destroyed and now %HESITATION experts and hazardous waste removal have come in from the environmental protection agency and they're trying to clean up the things that are left behind from the destruction of so many homes and businesses they're finding as best as they're pulling out cans of paint cans of acid there even finding unexploded grenades and ammunition as they come through here while scientists have studied wild fires for decades five years that race from the forest into large urban communities were until recently exceedingly rare but that's changing these types of fire become more frequent in nature where instead of once every decade it's once every summer if people be X. bows on a chronic level then we really need to know how that's going to affect health so we can start to be prepared for that scenario , public health researchers across the US are developing new lines of inquiry into the impact from wild fires like this study at UC Davis is that we're looking at chicken eggs %HESITATION mainly from backyards %HESITATION from fire affected areas because chickens tend to scratch and Peck at the ground which may be contaminated with potentially toxic ash from wildfires scientists many of them funded by the National Institute of environmental health sciences are also studying pregnant women who were exposed to polluted air and water after hurricane Harvey hit Houston in two thousand seventeen and residents of Porter Rico who were forced to live in I'm repaired homes were mold and fungus I grew after hurricane Maria in two thousand and seventeen they hope the research can help them better assess the impact of today's disasters and the damage that's still being done even after they're over