Automotive
Mazda's Onboard CO₂ Capture: Why Carbon-Negative Racing on HVO Does Not Add Up Yet
Mazda captured 804 g of CO₂ in a 24-hour race. Carbon-negative operation needs about 20 percent capture and durable storage. Neither is in place.
Lifecycle Analysis
Carbon Accounting
Is HVO Renewable Diesel Carbon-Neutral? Lifecycle Emissions by Feedstock, From Used Cooking Oil to Palm
No HVO pathway is carbon-neutral. Waste-oil HVO cuts emissions 75–88% vs diesel; crop-oil results hinge on land-use change.
Industry
Inert-Anode Chemistry and the ELYSIS Smelter in Québec: Can Alcoa and Rio Tinto Deliver Carbon-Free Aluminum by 2027
ELYSIS proved inert-anode smelting at 450 kA in 2025. Whether Rio Tinto's 2027 Arvida plant follows is the harder question.
Lifecycle Analysis
Wind Turbine Lifecycle Emissions and Carbon Payback: Why 11 g CO2-eq/kWh Depends on Capacity Factor, Allocation, and the Displaced Grid
Utility-scale wind converges near 11 g CO2-eq/kWh, but capacity factor, allocation convention, and the displaced grid decide the carbon payback.