Scientists have developed a breakthrough food supplement that could help save honeybees from devastating declines. By engineering yeast to produce six essential sterols found in pollen, researchers provided bees with a nutritionally complete diet that boosted reproduction up to 15-fold. Unlike commercial substitutes that lack key nutrients, this supplement mimics natural pollen’s sterol profile, giving bees the equivalent of a balanced diet.
Also, stop using pesticides/ herbicides in you garden, plant native flowering plants, mow after they finished flowering, let grass grow a bit, maybe mow alternating areas.
The only thing that may save some bees is the general laziness and apathy that most people have about the outdoors now. It won’t happen in the vast, vast stretches of HOA monitored hell that has sprawled across most of the USA, but at least in other neighborhoods I expect the people letting their yards overgrow will help a bit.
Still, everything gets washed in pesticides all the time. I don’t have high hopes for our ecosystem anymore.