3 programs, side by side

+ Add a program	York Environmental Science (BSc) - Faculty of Environmental & Urban Change OUAC YBS ☆ Add to planRemove	Carleton Science – Honours (4 years) OUAC CT ☆ Add to planRemove	Western Science OUAC ES ☆ Add to planRemove
Your average, their wayrequired courses forced in
Published rangetheir exact wording	80–87%“Low to mid 80s”	78%	80–87%“Low to mid 80s”
Required coursesforced into your top 6 — options are the row below	ENG4U	No course codes parsed — see prerequisites	ENG4UMCV4U
Choose one ofany of these satisfies it	—	—	two of ICS4U, MDM4U, MHF4U, SBI4U, SES4U, SPH4U
Prerequisitesas published	Ontario Secondary School Diploma (OSSD) ENG4U 4U Math 4U Science three additional 4U or 4M courses +5 more on the program page	Honours in Biochemistry, Bioinformatics, Biology, Biotechnology, Chemistry, Linguistics, Neuroscience and Mental Health, Psycholinguistics and Communications Differences, Psychology, and Gateway (Physical Sciences and Life Sciences): Advanced Functions (MHF4U) Two credits from Biology (SBI4U), Chemistry (SCH4U), Earth and Space Science (SES4U), or Physics (SPH4U) 3 best 4U/M courses +7 more on the program page	English, ENG4U Calculus and Vectors MCV4U Two of: Advanced Functions, MHF4U Biology, SBI4U +7 more on the program page
More than marks?supplementary application	Marks only	Marks only	Yes Unless otherwise noted, required courses must be completed with a minimum average of 70%. Western Integrated Science applicants must submit a supplementary application. More information Usually closes before January 15
Co-op	Available	Available	Available
Degree	—	—	—
First-year intakewhere published	25	—	550
What you study	Biological SciencesPhysical Geography	Audiology and Speech Language PathologyBiotechnologyChemistryEnvironmental Studies	Animal ScienceAstronomyBiological SciencesChemistry
What it is	Environmental Science combines the study of living systems and Earth's physical processes — like climate, water, and soil — to understand how natural environments work and respond to human activity. Unlike a program focused only on biology or only on geology, this degree integrates both to tackle real-world environmental problems. It suits students interested in conservation, resource management, or environmental consulting who want a broad scientific foundation rather than specialization in a single discipline.	This is a four-year science degree where you specialize in one of many fields — from chemistry and physics to biology, geology, audiology, linguistics, or environmental science. The honours designation means you go deeper into your chosen subject than a general science degree would. The program includes optional co-op work terms, letting you gain paid professional experience alongside your studies, which suits students who want both classroom learning and real workplace practice in their field.	This is a broad science degree where you choose from fields like biology, chemistry, physics, computer science, geology, and others. You take foundational science courses in first year, then specialize by selecting which science subjects to focus on. Co-op is available, letting you do paid work terms at science-related employers alongside your studies.
The door tomajors you reach through it	environmental science	biochemistrybiologychemistryearth scienceenvironmental sciencelife sciencesneurosciencephysics	biologychemistryearth scienceenvironmental sciencelife sciencesmathematicsphysicsstatistics
Entrance awardsat this campus, by average	29 published, 4 with no applicationfrom 75%See them	16 published, 9 with no applicationfrom 75%See them	6 published, 5 with no applicationfrom 85%See them
Source	York University on OUInfo	Carleton University on OUInfo	Western University on OUInfo

Ranges are what each university publishes, not guaranteed cutoffs, and limited-enrolment programs often admit above them. Confirm anything you are about to act on with the university; each column links to its source.