carbon-less
Not driving
Controls
Set your speed and hit start
Simulate a drive
Speed 0 mph
Fuel efficiency peaks between 35–55 mph. Speeds over 60 mph increase drag and emissions.
Live stats
Speed
0
mph
CO₂ rate
0.0
lbs/min
Trip total
0.0
lbs CO₂
Efficiency by speed
0–30 mph
moderate
30–55 mph
optimal
55–80 mph
high drag
Trip history
No trips yet
Emissions over time
847.3
lbs CO₂ since Jan 2025
↑ 12% this month
Jan – Mar 2025
Jan Feb Mar
This month
312.1
Daily avg
10.4
vs last month
+12%
Integrations MOCKUP
Connect via CarPlay
Auto-track drives
Detect trips automatically via GPS
CarPlay integration would use real-time GPS speed data to automatically track emissions without manual input. Feature shown as a design mockup.
CU DevFest 2024 · Best Environmental Project
Trip Summary
0.0
lbs of CO₂ emitted
Duration
—
Avg speed
—
Peak speed
—
vs Hybrid
—
—
Welcome to Carbon-less
Track your real-time carbon emissions while you drive. Built at Columbia DevFest 2024.
Select your vehicle
Choose from gas, SUV, hybrid, or EV to get accurate emissions data.
Start a drive
Hit Start Drive and drag the speed slider to simulate your trip in real time.
Track your history
See your cumulative emissions over time and get a trip summary after each drive.
This is a simulator prototype · CarPlay features are a mockup