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No, bromine exists in nature. It is common in seawater, and in underground aquifers that have been exposed to seawater in the "recent" past.
Helium is found in the sun. It is also found in the Earth's atmosphere.
Over time, minerals are created by elements bonding together to form other solutions. Since they are underground, there is nothing disrupts the process, which gives nature enough time to let the elements bond.
Yes . . . with conditions. It depends on whether the ground water is a 'spring' in nature or an aquifer. If a spring it is part of the hydrological cycle (rain falling on hills, seeping through the ground, creating creeks, rivers, and ending up in the ocean to be evaporated into clouds to cause rain on the hills etc). Aquifers can take millennium to 'recharge' so therefore can be called 'renewable' although that would be stretching the terminology.
They act as conduits for the ground-waterso putting into contact with the limestone to initiatedissolution of the limestone. Consequently they also guide passage directions and morphologies. At a much later stage they control the nature of collapses in large voids.
No, bromine exists in nature. It is common in seawater, and in underground aquifers that have been exposed to seawater in the "recent" past.
nature
Always longitudinal.
Yes
They all need disposable filters, or will wear out quickly. That's sadly the nature of these units.
Yes they are. In example, Wookey Hole in Somerse, England.
The climate or the weather causes weathering. If you mean seeds, then ice, rain, snow, foot traffic, and stomach acid of animals weather the seeds. In turn, it makes sprouting easier. If you mean erosion in general, then ice, rain, melting snow, wind, human or animal traffic, avalanches, and underground aquifers could all be contributing factors.
In nature, you could find it in sea water, magnesite, and dolomite.
It's pretty much a universal law of nature that everything travels in astraight path unless something else acts on it and causes it to bend.
It is in their nature, they live in underground burrows, so will dig in any surface thay can.
So many things wont to kill it above ground ...
The uncouth savages in Gulliver's Travels are called the Yahoos. They are depicted as wild, irrational beings who represent the worst aspects of human nature.