That is a debatable issue. There are economic arguments in favor of drilling for oil in protected areas, and environmental arguments against such drilling. My personal sympathies lie with the environmental arguments.
With your drill
Drill using a 280 degree drill by samsung drill and drill about 5cm by 5 cm
People drill wells to reach fresh water.
I agree that they should, because recent studies have shown the impact on the environment to be minimal. But every precaution must be taken to ensure that the ecosystem there is protected.
Drill sea water?
The advantages of using a battery-powered drill over a corded drill include portability, convenience, and the ability to use it in areas without access to electricity.
For drilling into metal, you should use a cobalt drill bit.
When people practice a specific play or routine in sport it is a drill.
Most places make no announcement over intercom pr public address systems during a fire drill. They sound the evacuation alarm (usually a bell, horn or klaxon) and people evacuate the building, just as if it were a real fire. An intercom or PA announcement may be made when the all clear is given and people reenter the building. That announcement might be something like, "This has been a drill, Thank you for your cooperation." If the intercom is the only way to alert people to the need to evacuate, then an announcement that the building is to be evacuated should be made. To make the drill most effective, it should be the same announcement that would be used in a real fire, and should not include the information that "this is a drill." So it might be something like "Attention! Attention! Please walk quickly and calmly to your nearest exit and evacuate the building." If you tell people it is a drill, some will ignore it and not evacuate - and that reduces the effectiveness of the drill.
For an M6 tap, a drill bit size of 5.0mm should be used.
Translation: Ejercicio -- Although for a specific type of "drill" you should consult with individuals in the field.
The size of the drill bit you should use for your project depends on the size of the hole you need to drill. Check the project specifications or use a drill bit sizing guide to determine the appropriate size for the job.