1. BSES Foundations: Mathematics, Statistics, and Computation.
   1. Calculus. One (1) of the following:
      1. Calculus I. One (1) course:
         • MATH-M 211 Calculus I i
         • MATH-S 211
      2. Brief Survey of Calculus. Two (2) courses:
         • MATH-M 119 Brief Survey of Calculus I i
         • MATH-M 120 Brief Survey of Calculus II i
   2. Statistics. One (1) course:
      • EAS-E 314 Data Analysis for Earth Science i
      • GEOG-G 488 Applied Spatial Statistics i
      • STAT-K 310 Statistical Techniques i
      • SPEA-K 300 Statistical Techniques i
   3. Computation. One (1) course:
      • CSCI-A 110 Introduction to Computers and Computing i
      • CSCI-A 321 Computing Tools for Scientific Research i
      • GEOG-G 250 Computing in the Geospatial Sciences i
      • BUS-K 201 The Computer in Business i
      • SPEA-E 325
      • SPEA-V 261 Using It in Public Affairs i
      Expand or hide additional courses that may be applied toward this requirement
2. BSES Foundations: Chemistry.
   1. Fundamentals of Chemistry Lecture. One (1) course:
      • CHEM-C 117 Principles of Chemistry and Biochemistry I i
      • CHEM-H 117 Principles of Chemistry and Biochemistry I, Honors i
      • CHEM-J 117 Principles of Chemistry and Biochemistry for Science Majors i
   2. Fundamentals of Chemistry Lab. One (1) course:
      • CHEM-C 127 Principles of Chemistry and Biochemistry I Laboratory i
      • CHEM-H 127 Principles of Chemistry and Biochemistry I Laboratory, Honors i
      • CHEM-X 150 ASURE Chemistry Research Lab I i
   3. Organic Chemistry Lecture. One (1) course:
      • CHEM-C 341 Organic Chemistry I Lectures i
      • CHEM-H 341 Organic Chemistry I Lectures, Honors i
      • CHEM-R 340 Survey of Organic Chemistry i
   4. Chemistry Elective. One (1) course:
      • CHEM-A 314 Biological and Environmental Chemical Analysis i
      • CHEM-C 342 Organic Chemistry II Lectures i
      • CHEM-H 342 Organic Chemistry II Lectures, Honors i
      • EAS-E 444 Methods in Analytical Geochemistry i
      • SPEA-E 464 Organic Pollutants: Environmental Chemistry and Fate i
3. BSES Foundations: Physics. One (1) course:
   • PHYS-P 201 General Physics I i
   • PHYS-P 221 Physics I i
   • PHYS-H 221 Honors Physics I i
4. BSES Foundations: Biology.
   1. Evolution and Diversity. One (1) course:
      • BIOL-E 111 Basic Biology by Examination I i
      • BIOL-L 111 Foundations of Biology: Diversity, Evolution, and Ecology i
   2. Biological Mechanisms. One (1) course:
      • BIOL-E 112 Basic Biology by Examination II i
      • BIOL-L 112 Foundations of Biology: Biological Mechanisms i
5. BSES Foundations: Writing. One (1) course:
   • ENG-W 231 Professional Writing Skills i
   • ENG-W 240 Community Service Writing i
   • ENG-W 270 Argumentative Writing i
6. Environmental Science Courses.
   1. Introductory Course. One (1) course:
      • EAS-E 105 Earth: Our Habitable Planet i
      • GEOG-G 107 Physical Systems of the Environment i
      • GEOG-G 208 Environment and Society i
      • SPEA-E 272 Introduction to Environmental Sciences i
   2. Electives. 27 credit hours:
      • BIOL-B 300 Vascular Plants i
      • BIOL-L 211 Molecular Biology i
      • BIOL-L 307
      • BIOL-L 311 Genetics i
      • BIOL-L 318 Evolution i
      • BIOL-L 319 Genetics Laboratory i
      • BIOL-L 326 Biodiverse-City. The Art and Science of Green Infrastructure i
      • BIOL-L 328 Disease Ecology and Evolution i
      • BIOL-L 350 Environmental Biology i
      • BIOL-L 376 Biology of Birds i
      • BIOL-L 402 Ecosystem Ecology and Global Change i
      • BIOL-L 433 Tropical Biology i
      • BIOL-L 472 Microbiomes: Host and Environmental Health i
      • BIOL-L 473 Ecology i
      • BIOL-L 474 Field and Laboratory Ecology i
      • BIOL-M 250 Microbiology i
      • BIOL-M 250 Microbiology i
      • BIOL-M 315 Microbiology Laboratory i
      • BIOL-M 465 Environmental Microbiology Laboratory i
      • BIOL-Z 373 Entomology i
      • BIOL-Z 374
      • BIOL-Z 375 Invertebrate Zoology Laboratory i
      • BIOL-Z 406 Vertebrate Zoology i
      • BIOL-Z 476 Biology of Fishes i
      • CHEM-A 314 Biological and Environmental Chemical Analysis i
      • CHEM-A 315 Chemical Measurements Laboratory i
      • CHEM-A 316 Bioanalytical Chemistry Laboratory i
      • CHEM-C 317 Equilibria and Electrochemistry i
      • CHEM-C 318 Spectrochemistry and Separations i
      • EAS-A 339 Weather Analysis and Forecasting i
      • EAS-A 347 Instrumentation for Atmospheric Science i
      • EAS-A 364 Atmospheric Dynamics I i
      • EAS-A 437 Advanced Synoptic Meteorology and Climatology i
      • EAS-A 476 Climate Change Science i
      • EAS-A 410
      • EAS-E 225 Earth Materials i
      • EAS-E 226 Earth Processes i
      • EAS-E 227 Earth Climate and History i
      • EAS-E 316 Mineral Fuels and Materials i
      • EAS-E 333 Sedimentation and Tectonics i
      • EAS-E 334 Principles of Sedimentology and Stratigraphy i
      • EAS-E 341 Natural History of Coral Reefs i
      • EAS-E 351 Elements of Hydrology i
      • EAS-E 406 Introduction to Geochemistry i
      • EAS-E 411 Invertebrate Paleontology i
      • EAS-E 412 Introduction to Vertebrate Paleontology i
      • EAS-E 415 Principles of Geomorphology i
      • EAS-E 423 Methods in Applied Geophysics i
      • EAS-E 435 Glacial and Quaternary Geology i
      • EAS-E 444 Methods in Analytical Geochemistry i
      • EAS-E 451 Principles of Hydrogeology i
      • EAS-E 488 Paleoclimatology: A Geological Record of Earth's Climate History i
      • EAS-X 420 Regional Geology Field Trip i
      • GEOG-G 304 Physical Meteorology and Climatology i
      • GEOG-G 307 Biogeography: The Distribution of Life i
      • GEOG-G 336 Environmental Remote Sensing i
      • One of the following:
        • GEOG-G 338 Geographic Information Systems i
        • SPEA-E 418 Vector-Based Gis i
      • GEOG-G 341 Ecological Restoration: Science, Politics, and Ethics i
      • GEOG-G 350
      • GEOG-G 405 Ecological Climatology i
      • GEOG-G 407
      • GEOG-G 436
      • GEOG-G 438 Advanced Geographic Information Systems i
      • GEOG-G 444 Climate Change Impacts i
      • GEOG-G 451 Physical Hydrology i
      • GEOG-G 452 Tree-Ring Science i
      • GEOG-G 485 Geospatial Programming i
      • GEOG-G 488 Applied Spatial Statistics i
      • GEOG-G 489 Geospatial Analysis of Big Data in Python i
      • PHYS-P 310 Environmental Physics i
      • PHYS-P 317 Signals and Information Processing in Living Systems i
      • SPEA-E 260 Introduction to Water Resources i
      • SPEA-E 332 Introduction to Applied Ecology i
      • SPEA-E 355 Introduction to Limnology i
      • SPEA-E 375 Techniques of Environmental Science i
      • SPEA-E 400 Topics in Environmental Studies (Approved topics: "PLANTS AND PLANT COMMUNITIES" (TPC 138); "RADIOLOGICAL HAZARD MANAGEMENT" (TPC 123)) i
      • SPEA-E 401 Human Behavior and Energy Consumption i
      • SPEA-E 410 Introduction to Environmental Toxicology i
      • SPEA-E 411 Introduction to Groundwater Hydrology i
      • SPEA-E 426 Applied Mathematics for Environmental Science i
      • SPEA-E 431 Water Supply and Wastewater Treatment i
      • SPEA-E 440 Wetlands Ecology and Management i
      • SPEA-E 442 Habitat Analysis-Terrestrial i
      • SPEA-E 443 Habitat Analysis-Aquatic i
      • SPEA-E 451 Air Pollution and Control i
      • SPEA-E 452 Solid and Hazardous Waste Management i
      • SPEA-E 455 Limnology i
      • SPEA-E 456 Lake and Watershed Management i
      • SPEA-E 457 Introduction to Conservation Biology i
      • SPEA-E 460 Wildlife Management i
      • SPEA-E 461 Wildlife Techniques i
      • SPEA-E 464 Organic Pollutants: Environmental Chemistry and Fate i
      • Up to six (6) credit hours (combined total) of any of the following:
        • BIOL-X 490 Individual Study i
        • EAS-X 498 Undergraduate Research in Geosciences i
        • GEOG-X 490 Undergraduate Readings and Research in Geography i
        • SPEA-E 490 Directed Research in Environmental Science i
      Expand or hide additional courses that may be applied toward this requirement
7. Field Experience*.
   1. Single-Course Option. One (1) course:
      • EAS-X 329 Introductory Field Experience in Environmental Science i
      • EAS-X 479 Geology, Hydrology and Geochemistry in the Rocky Mountains i
   2. Two-Course Option. Two (2) courses:
      • EAS-X 420 Regional Geology Field Trip i
      • GEOG-G 350
      • GEOG-G 452 Tree-Ring Science i
      • SPEA-E 375 Techniques of Environmental Science i
      • SPEA-E 400 Topics in Environmental Studies (approved topics only; see academic advisor)i
      • SPEA-E 422 Urban Forest Management i
      • SPEA-E 440 Wetlands Ecology and Management i
      • SPEA-E 442 Habitat Analysis-Terrestrial i
      • SPEA-E 443 Habitat Analysis-Aquatic i
      • SPEA-E 455 Limnology i
      • SPEA-E 482 Overseas Topics in Environmental Science (approved topics only; see academic advisor)i
      Expand or hide additional courses that may be applied toward this requirement
8. Major GPA, Hours, and Minimum Grade Requirements.
   1. At least 18 credit hours in the major must be completed in courses taken through the Indiana University Bloomington campus or an IU-administered or IU co-sponsored Overseas Study program.
   2. At least 18 credit hours in the major must be completed at the 300–499 level.
   3. Except for the GPA requirement, a grade of C- or higher is required for a course to count toward a requirement in the major.
   4. A GPA of at least 2.000 for all courses taken in the major—including those where a grade lower than C- is earned—is required.
   5. Exceptions to major requirements may be made with the approval of the department's Director of Undergraduate Studies, subject to final approval by the College of Arts and Sciences.

The Bachelor of Science degree requires at least 120 credit hours, to include the following:

1. College of Arts and Sciences Credit Hours. At least 100 credit hours must come from College of Arts and Sciences disciplines.
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2. Upper Division Courses. At least 36 credit hours (of the 120) must be at the 300–499 level.
3. College Residency. Following completion of the 60th credit hour toward degree, at least 36 credit hours of College of Arts and Sciences coursework must be completed through the Indiana University Bloomington campus or an IU-administered or IU co-sponsored Overseas Study program.
4. College GPA. A cumulative grade point average (GPA) of at least 2.000 is required for all courses taken at Indiana University.
5. CASE Requirements. The following College of Arts and Sciences Education (CASE) requirements must be completed:
   1. CASE Foundations
      1. English Composition: 1 course
      2. Mathematical Modeling: 1 course
   2. CASE Breadth of Inquiry
      1. Arts and Humanities: 2 courses
      2. Natural and Mathematical Sciences: 4 courses
      3. Social and Historical Studies: 2 courses
   3. CASE Culture Studies
      1. Diversity in the United States: Not required
      2. Global Civilizations and Cultures: Not required
   4. CASE Critical Approaches: 1 course
   5. CASE Foreign Language: Proficiency in a single foreign language through the second semester of the first year of college-level coursework
   6. CASE Intensive Writing: 1 course
   7. CASE Public Oral Communication: 1 course
6. Major. Completion of the major as outlined in the Major Requirements section above.

Most students must also successfully complete the Indiana University Bloomington General Education program.