oops!

I just realised that i didn't actually put up my whole intro yet so here it is( from the beginning)
Soil pollution is when the pollutants in soil are above a certain level causing the soil to lose one or more of its functions (EUROPA, 16/6/2010). Soil pollution may also be thought of as the presence of manmade chemicals or any other modifications in the natural environment (EUROPA, 16/6/2010). The most common chemicals causing soil pollution are: petroleum hydrocarbons, pesticides, lead used in cars and house paint and other heavy metals (EUROPA, 16/6/2010) (SAFER SOLUTIONS, N.D). The occurrence of this manifestation is linked with industrialisation and the intensity of chemical usage (EUROPA, 16/6/2010). Soil pollution is widespread in all areas and is often the outcome of years of planned or unintentional emission of pollutants (SAFER SOLUTIONS, N.D).
The aim of the experiment is to investigate which soil absorbs the greatest amount of pollutants in the environment. The two main components that control the storage and the movement of liquids in rocks and sediments are porosity and permeability (enotes, N.D). Porosity is the ratio of the volume of pores or openings to the total volume of the rock sediment (enotes, N.D). It is usually expressed as a percentage. Basically, the porosity of a rock is the spaces in between the grains (enotes, N.D). Therefore, if the grains are tightly packed, it sediment has a lower porosity (enotes, N.D). Permeability is how easily liquids flow through a porous sediment. Even if sediment has a high porosity, if the voids are not interconnecting properly, the liquid may not move through (enotes, N.D). Like in porosity, how tightly packed the grains are and the shape of the grains determine how permeable a certain sediment is (enotes, N.D).
The experiment will help determine whether the hypothesis, a soil type with more porosity will have more space for the pollutant to fill and therefore it will absorb more of the pollutant, is true or not.
The experiment involves: white sand, potting mix and common soil from the garden. The soil from the garden consisted of dead roots, leaves, small branches and rocks. Whereas the potting mix consisted of Wettasoil granular soil wetter, base fertiliser and BioActive compost coir dust. Coir dust is a spongy like residue from the husks of coconut. Coir dust is also hydrophilic which means it attracts water and strongly absorbs liquids and gasses Cresswell, Geof. N.D. p.2). This should therefore make the potting mix the most absorbent. Sand is made of sandstone and the porosity of sandstone is 5-30% (SEED, N.D). The porosity of typical soil is 55% and the porosity of the potting mix is unknown (SEED, N.D).
...this is the actual thing... if you didn't realise..
bye