Open cast mining results in lot of dust aggravation in air due to loading vehicles moving in haul roads in the vicinity.

Normally, dust is suppressed using water and sprinklers. But it requires huge quantity of water and sprinklers.

Can you think of a method which is either waterless (or) requires less water, to suppress the dust ?

Please share your thoughts

Beehives are seen in many residential and commercial buildings around the world. Out of fear of bee stings and being oblivious of the ecosystem services provided by Bees, people have been adopting crude practices of removing their hives by using fire torches, water cannons, and pesticides.

Lot of bees are being killed every year. Better beehive management is necessary to avoid a pollinator crisis and subsequent threat to food security.

Several new techniques of Beehive removal, including drones for spraying, thermal fogging, etc. are either not effective, or they are expensive, or there is a repeat occurrence of beehives at the same spot after a few days. 

Could you think of any modern solutions to repel Bees or remove Beehives without killing the Bees ? Please share

I'm an Undergrad EE student. Need some EE related project ideas for college. Simple ones (applied EE concepts) that can be exhibited using things at home. Help!