I went to a friends bbq this weekend. They were burning the duralogs in the fire pit. I know those logs contains a lot of chemicals. I was also surrounded by citranella candles and table candles drenched in lighter fluid (not sure what they're called, it has an open flame). I was feeling light headed at one point so I took frequent bathroom breaks to get away. I wasn't sure if it was the chemicals or the smoke. What do you think? Is it safe?