CM8001

In Singapore’s context, Singapore is a port and thus, sea space is highly important for our economy. Desalination plants are required to be near the ocean so as to draw water from the sea, causing such plants to take much of Singapore’s sea space. Desalination plants require a lot of heat to produce drinking water, so large amount of fuel resources are required, making it unsuitable to be widely used in Singapore.

In a worldwide context, distillation is an expensive process making it unsuitable to produce potable drinking water in countries that lack economic power.

Water-soluble vitamins are polar compounds while fat-soluble vitamins are non-polar. This is due to “like dissolves like”. Polar compounds, such as water-soluble vitamins, tend to dissolve well in polar solvents (ie. water). Fat-soluble vitamins are non-polar due to the large amount of phospholipids present, making it hydrophobic and therefore water-insoluble. They are instead soluble in fat, which are non-polar, due to their non-polar interactions.

a. Hanging your laundry to dry, instead of using a dryer, uses lesser electricity and thus saves on the amount of fuel used.

b. Walking, biking or taking public transportation to work will reduce the amount of fuel-usage and thus reduce the emissions of NOx and SOx.

c. Running dishwashers and washing machines with small loads will require us to run these appliances more frequently and thus, uses more electricity.

d. Adding insulation allows heat transfer to be more efficient and thus reducing the amount of heat wastage and the amount of electricity needed to generate heat.

e. Buying locally grown produce will reduce demand for imported food. Importing food from foreign countries requires air transportation and thus uses up jet fuel. By importing less food, the country can save on the amount of fuel used and thus reduce the emission of SOx and NOx.

a. Power plant can produce water vapor, sulfur oxide and even ash, if not collected properly. Burning of coal usually results in incomplete combustion and this releases soot into the air, causing smog to be formed and thus leading to poor visibility in the area.

b. The pH of natural rain is 5.6 and for every drop in pH unit, the acidity of the solution increases by 10 times. Thus, the pH of the rainfall in the park should be 4.6.