代写ENV221H – Fall 2025 Tutorial # 4 Environmental Health帮做R语言

ENV221H – Fall 2025

Tutorial # 4 (week of Nov 17th) – Environmental Health

Please carry out these two activities in preparation for discussions during tutorial, and submit the results in the Tutorial 4 assignment link on Quercus before noon on the day of your tutorial.

Part I: Personal Care Products Exposure to Chemicals of Concern

Prepare a list of the cosmetics and personal care products you use on a weekly basis.   Typically this can include toothpaste, soap, shampoo, conditioner, moisturizers, deodorant, cosmetics, etc...

For each product, review the ingredients list (if available) and identify whether it contains any of the chemicals listed below.

. BHA and BHT

. Coal tar dyes: look for P-Phenyl-enediamine and colours identified as “C.I.” followed by five digits

. Cyclomethicone and siloxanes

. DEA, MEA, and TEA

. Dibutyl Phthalate

. Formaldehyde-releasing preservatives: look for DMDM Hydantoin, diazolidinyl Urea, Imidazolidinyl Urea, Methenamine, or Quarteruium-15

. Parabens

. Parfum

. PEG

. Petrolatum

. Sodium Laureth Sulfate (SLES) and Sodium Lauryl Sulfate (SLS)

. Triclosan

For a fuller description of these chemicals, visit

https://davidsuzuki.org/science-learning-centre-article/whats-inside-counts-survey-toxic-ingredients-cosmetics/

You may choose to assemble the information in a table like the following.

Product	Chemicals
Colgate Total Toothpaste with Whitening	Triclosan
“Because I’m Special” Shampoo for Frizzy Hair	Ingredient list not available

Part II: Plastic Consumption Calculator

Visit the Plastic Footprint Calculator at:

https://www.omnicalculator.com/ecology/plastic-footprint

Provide estimates of your plastic consumption in the: Food & Kitchen Needs, Bathroom & Laundry; Disposable Containers and Packaging, and Other categories to provide an estimate of your total plastic footprint for the year.

Fill in the chart below with the results provided.

Average plastic use, per person, per year

	Lb		Kg
Global
USA
Europe
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