This winter thousands of bees died . Why are scientists worried ? They're worried because 1/3 of the human diet consists of food the bees have to pollinate. Later pesticides were found in their hives...could this be the reason why many of them have died? see this link on yahoo:
There is indeed a problem in the USA, but worth pointing out that Colony Collapse Disorder (CCD) has not as yet been identified in the UK. For bees also read the Honeybee, Apis melifera (and subspecies) not all bees (including bumblebees and solitary bees, although some of these species have their own problems).
Also worth reassuring 'the world' that nearly all bees are pollinators of fruits and vegetables, as are many other insects, so as long as we consider the needs of all bees, (the majority being solitary not social species) by providing nesting sites and nectar rich flowers, we will be OK. The honeybee is the only species that provides us with honey and beeswax though so these commodities may indeed be rising in price. Time to stockpile honey perhaps? Mind you that's just what the honeybees do before beekeepers rob their hives for their glorious golden stored resource - poor bees indeed.