Are you killing bees

Something is killing honey bees world wide. Their numbers have been diminishing every year for the last 4-5 at least. This is extremely serious for humans, as we rely on the honey bee to pollinate many necessary plants as well as produce honey. There are many investigations going on to find the answers, but no definitive conclusion has come up yet. Suspected reasons range from parasites that weaken their defences to the proximity of high power electrical lines.