How to Write an Active Vs Passive Voice for Environmental Science

Environmental science writing requires a delicate balance between documenting objective natural processes and describing rigorous human-led interventions. Choosing between active and passive voice is not just a stylistic preference but a tool for clarity in complex systems, from hydrological modeling to biodiversity assessments.

What Is an Active Vs Passive Voice in Environmental Science?

In environmental science, the active voice attributes an action directly to a subject (e.g., 'The runoff eroded the bank'), while the passive voice focuses on the recipient of the action (e.g., 'The bank was eroded by the runoff'). While many STEM fields traditionally leaned toward passive voice to imply objectivity, modern environmental journals like Nature Climate Change and Journal of Ecology increasingly favor the active voice to clarify who performed a measurement or what specific factor drove a change in an ecosystem.

Before You Start

• Review the specific author guidelines for journals like 'Global Change Biology' or 'Environmental Science & Technology' to check their voice preference.
• Identify the primary focus of your sentence: is it the researcher's methodology or a natural phenomenon?
• Distinguish between your 'results' (often active) and your 'methods' (where passive is sometimes still standard).
• Clarify your subjects: ensure you can distinguish between biological agents, chemical reagents, and human investigators.

Use Active Voice for Results and Ecological Drivers

When describing how one environmental variable impacts another, use the active voice. This establishes a clear cause-and-effect relationship which is vital for ecological modeling.

Example: Increased nitrogen deposition reduced the mycorrhizal fungi diversity in the soil samples.

Tip: Identify the 'driver' in your ecosystem and make it the subject of the sentence.

Employ Passive Voice for Standardized Lab Procedures

In the Methods section, the focus should be on the process, not the person. If any researcher could have performed the titration or the soil sieving, use the passive voice.

Example: The water samples were filtered through a 0.45 μm membrane to remove suspended solids.

Tip: Avoid starting every sentence with 'I' or 'We' during routine laboratory protocols.

Switch to Active Voice to Highlight Researcher Decisions

When you make a non-standard choice—such as selecting a specific site for a longitudinal study—the active voice clarifies that this was a deliberate human decision.

Example: We selected the Hubbard Brook Experimental Forest due to its well-documented history of acid rain research.

Tip: Use 'We' when justifying specific experimental designs or site selections.

Use Active Voice for Conclusions and Implications

When suggesting policy changes or summarizing the significance of findings, the active voice provides a stronger, more authoritative tone.

Example: These findings suggest that current carbon sequestration strategies overestimate the capacity of boreal forests.

Tip: Let your data 'act' as the subject to give your conclusions more weight.

Avoid the 'Passive Trap' in Climate Modeling

Passive voice can obscure the source of uncertainty. In climate projections, using the active voice helps identify which model or parameter is responsible for a specific output.

Example: The CMIP6 models predict a higher frequency of extreme precipitation events in the Sahel region.

Tip: Name the specific model or algorithm as the actor to increase transparency.

Check for Dangling Modifiers in Passive Sentences

Environmental writing often involves complex equipment. Passive sentences often lead to 'dangling modifiers' where the subject of a phrase is unclear.

Example: Incorrect: After collecting the samples, they were placed in a cooler. (The samples didn't collect themselves). Correct: After collecting the samples, we placed them in a cooler.

Tip: If a sentence starts with an '-ing' verb, the person doing the action must follow immediately.

Use Passive Voice to Emphasize the Affected Ecosystem

If the most important part of the sentence is the habitat being destroyed or restored, the passive voice keeps the reader's focus on that habitat.

Example: The coastal wetlands were submerged by the rising sea levels during the storm surge.

Tip: Use passive voice when the 'victim' of an environmental change is the focal point.

Common Mistakes to Avoid

• Overusing 'It is believed that...' which weakens the scientific evidence behind climate claims.
• Using passive voice to hide the fact that a sample size was too small or a method was flawed.
• Switching voices mid-paragraph without a logical reason, which disrupts the flow of a field report.
• Using the active voice for natural processes that are actually passive (e.g., 'The sun evaporated the water' is often better as 'The water evaporated').
• Using 'We' excessively in a way that sounds like a personal narrative rather than a scientific report.

Pro Tips

• Search your draft for 'by the'—this often signals a passive sentence that could be more impactful if flipped to active.
• In the Discussion section, use active voice to compare your results with previous studies (e.g., 'Our results contradict the findings of Smith et al.').
• Reserve the passive voice for describing 'The Study Area' to maintain a descriptive, objective tone.
• Read your abstract aloud; if it feels sluggish, convert the primary finding into the active voice.
• Check the 'Instructions for Authors' in the journal 'Oecologia'; they specifically encourage the active voice for clarity.

Frequently Asked Questions

Is it okay to use 'I' or 'We' in environmental science papers?

Yes, most modern environmental journals prefer 'We' to clarify researcher actions, especially in the methodology and discussion. However, avoid overusing it to keep the focus on the data.

Which voice is better for an Environmental Impact Assessment (EIA)?

An EIA often uses a mix: passive voice for describing the existing environment and active voice for describing the proposed mitigation measures and their expected impacts.

Does passive voice make my writing sound more objective?

Not necessarily. While it was once the standard, many editors now find that passive voice obscures responsibility and makes complex ecological interactions harder to follow.

Should the abstract be in active or passive voice?

The abstract should primarily use the active voice to highlight the main findings and their implications, as this is the most read part of the paper and needs to be engaging.

Related Resources

• How to Write an Active Vs Passive Voice for Computer Science

• How to Write an Active Vs Passive Voice for Biology

• How to Write an Active Vs Passive Voice for Psychology

• How to Write a Sentence Rewriting for Environmental Science

• How to Write Topic Sentences for Environmental Science

• How to Write a Paragraph Structure for Environmental Science

• Find Peer-Reviewed Sources with Sourcely

• Polish Your Writing with Revise AI