I believe it is C. Hrothgar.
I think the answer may be water pollution.
water pollution > Water pollution<span> is the contamination of </span>water<span> bodies (e.g. lakes, rivers, oceans, aquifers and groundwater). This form of environmental degradation occurs when </span>pollutants<span> are directly or indirectly discharged into </span>water<span> bodies without adequate treatment to remove harmful compounds.
source: Wikipedia </span>
As far as I can see, there is only one word in the paragraph which is misspelled, and that would be desidne.
I'm assuming you wanted to write 'design,' because to design a building means to create a sketch of what it would look like when it is built.
