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At age 45, Becky was diagnosed with chronic obstructive pulmonary disease (COPD), a chronic lung disease that makes breathing increasingly difficult

No installation needed: Just plug in to the mains, switch on, and enjoy cleaner, odour-free air wherever you are

We were motivated to do this study because a substantial number of people say they use cannabis for headaches and migraine, but surprisingly few studies had addressed the topic, said Cuttler, the lead author on the paper

Some blends benefit from brief air exposure (breathing), but prolonged contact dries tobacco and mutes delicate flavors

"I think other states have had higher levels of mass media marketing for longer," Mr Barnsley said.