Explanation:
3% of the earth's water is fresh. 2.5% of the earth's fresh water is unavailable: locked up in glaciers, polar ice caps, atmosphere, and soil; highly polluted; or lies too far under the earth's surface to be extracted at an affordable cost. 0.5% of the earth's water is available fresh water.4 nov. 2020
Many South Africans had to live in make-shift shelters such
as tents after war. This was due to the
scorched earth policy that the British used against Boer commandos that led to the
weakening of their resolve. Prior to
this, families were also rounded up and placed in camps guarded by the British
which demoralized the Boers.
Answer:
Radioactive isotopes are unstable and will decay. ... The isotopes will decay into a stable isotope over time. Scientists can tell how old the rock was from looking at the radioactive isotope's half-life, which tells them how long it would take for there to be half the radioactive isotope and half the stable isotope.
Explanation:
Brownfields are unused urban spaces, usually defined by their previous industrial use and therefore might have soil contamination but not necessarily. Their shared characteristics are that they no longer serve the intended purpose (eg. Factory gone bankrupt), are abandoned or at leasr under used, contain(ed) buildings, might be contaminated, requite outside help to be revitalised.
