Commute Emissions Note Analyzer

How Commute Emissions Note Analyzer works

Press Load model once: your browser downloads Gemma 4 E2B instruction-tuned (web build) (2.0 GB) from this site and keeps it in its cache. Then add your text and press Analyze locally. The model runs on this device using your graphics card, so nothing you enter is sent to a server. Until the model is loaded, or if your device cannot run it, the tool falls back to a simple keyword check and labels the result as the fallback.

Gemma 4 E2B instruction-tuned (web build) is a small open language model from Google. The tool sends it the instruction below plus your text, asks for a JSON answer with fixed fields, and shows each field as a card. It runs at temperature 0, so the same input gives the same answer on the same device, though different graphics cards can word it slightly differently.

Inputs longer than 6,000 characters are cut to that length before they reach the model, and the result says so. The model only sees what you paste: it does not look anything up.

The instruction the model gets

You read a note about someone's commute and extract the facts needed for an emissions estimate: distances, trips per week, vehicle type, fuel economy and other modes used. Do not add, subtract, multiply, average or convert any numbers; copy every figure exactly as written. Do not estimate emissions; a calculator does that.

What it returns

• Trips: Each commute leg or pattern with distance and frequency as written, e.g. '18 miles each way, 4 days a week'.
• Modes and vehicles: Each mode (car, train, bus, bike, walk) and vehicle detail such as fuel type or mpg, as written.
• Missing for an estimate: Facts a calculator would still need, such as fuel economy, passenger count or distance.
• Lower-carbon options: Changes the note itself makes possible, e.g. using the train on more days, carpooling with a named coworker.

Worked example

The model's output for the built-in sample, recorded on a desktop browser. Your run may word things slightly differently.

Commute note: 18 miles each way, drive alone four days, hybrid car 42 mpg, occasional train on Fridays, traffic adds 20 minutes.

Trips

18 miles each way, four days a week

Modes and vehicles

drive alone hybrid car 42 mpg train on Fridays

Missing for an estimate

trips per week for train

Lower-carbon options

using the train on Fridays

The model

The files are served from this site, versioned so a cached copy is never stale. Nothing is fetched from a third party while you use the tool.

Limitations

• Small language models make mistakes: they can miss an item, merge two, or state something more confidently than the text supports. Check the result against your input before you rely on it.
• It needs WebGPU and about 8 GB of memory, so it is offered on desktops and laptops, not on phones and tablets. Devices that cannot run it get the keyword fallback, clearly labelled.
• Results describe the input you gave, not the real-world situation behind it. Review them yourself before acting.

Good uses

• Triage climate and sustainability notes before deeper review
• Prepare consistent labels for repeat workflows
• Reduce manual sorting on small batches
• Keep sensitive drafts in the browser preview