Decarb

Eating a cheeseburger every day adds an estimated 0.9 tons CO₂e to your annual footprint. Beef produces roughly 50 kg CO₂e per 100g protein — around 30 times more than lentils.

The −98% difference isn't a rounding error. It's the result of land use, methane, and feed production adding up across the supply chain.

Frequency matters more than brand or sourcing. Grass-fed beef still emits 43–55 kg CO₂e per 100g protein — the label changes, the order of magnitude doesn't.

The single highest-leverage food change isn't going fully plant-based. It's reducing beef specifically.

Calculate your full food footprint at decarb.co/calculator

Source: Poore & Nemecek, Science 2018

A typical 6 kW rooftop solar system eliminates an estimated 1.8 tons CO₂e per year from your electricity bill — and saves around $1,400 annually at average US electricity prices.

The two figures don't always move together:

Hawaii: high electricity prices mean high dollar savings (~$2,800/yr), and the grid is oil-heavy so CO₂e displacement is also significant.

Pacific Northwest: lower dollar savings (cheaper electricity), and lower CO₂e displaced — because hydro already makes the grid relatively clean. Installing solar there still makes financial sense in some cases, but the emissions case is weaker.

The calculator uses NREL PVWatts irradiance data and eGRID 2023 state grid factors, so both outputs reflect your actual state rather than a national average.

Calculate your rooftop solar saving at decarb.co/solar-calculator

Source: eGRID 2023 · NREL PVWatts · EIA electricity prices 2024

Three new calculators — each designed to answer one specific question in under a minute, with two outputs: the CO₂e figure and the dollar saving.

Flight emissions calculator (decarb.co/flight-calculator)
Enter any route and get the estimated CO₂e per passenger — economy or business, with or without radiative forcing. No dollar savings figure: flying cheaper doesn't reduce emissions, and the calculator is honest about that.

EV vs petrol calculator (decarb.co/ev-calculator)
Enter your current car's MPG, annual miles, and US state. Get the estimated tons CO₂e saved per year and the estimated fuel cost saving — both adjusted for your state's grid and local energy prices.

Solar PV savings calculator (decarb.co/solar-calculator)
Enter your state and monthly electricity bill. Get the estimated CO₂e avoided and annual bill saving for a rooftop system — using NREL PVWatts irradiance data and eGRID 2023 grid factors.

All three are free, no account required, and link through to the full footprint calculator if you want the complete picture.

Source: ICAO ICEC · eGRID 2023 · NREL PVWatts · EIA 2024

Grass-fed beef is widely perceived as a low-emission alternative. The data doesn't support it.

Grass-fed cattle take longer to reach slaughter weight — more methane per kg of beef. Any soil carbon benefit offsets at most 20–60% of total emissions, and those offsets aren't permanent. The meaningful comparison isn't grass-fed vs feedlot. It's beef vs everything else.

Calculate yours → https://decarb.typeform.com/to/hKcrdP?utm_source=facebook&utm_medium=post