Emergency services were hit by a surge in 999 calls yesterday as the deadly smog tightened its grip on Britain. Complaints about breathing problems rocketed and people were urged to avoid strenuous outdoor activity as the fumes enveloped many parts of the country. David Cameron, who abandoned his regular morning jog, was criticised for dismissing the potent cocktail of toxic particles, factory pollution and dust from the Sahara as a 'naturally occurring weather phenomenon'. Full story >>
If you choke, or if something chokes you, you stop breathing because something is blocking your throat. • Children can choke on peanuts.