Science
The science behind carbon numbers, explained in plain language.
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Is Natural Gas Renewable? No, and Here Is Why (2026)
No. Natural gas is a fossil fuel formed over millions of years. Renewable natural gas is under 0.2% of US supply. See emissions vs…
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kW vs kWh: What Is the Difference? (2026 Guide)
A kW measures power; a kWh measures energy (1 kW for 1 hour). See the formula, conversions, appliance examples, cost per kWh and CO₂…
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How Much Electricity Does a Wind Turbine Produce? (2026)
An average new US wind turbine (3.8 MW) produces about 11,300 MWh a year, enough for roughly 1,050 homes. See output per day, hour…
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Emission Factors Explained: Where Carbon Footprint Numbers Come From
An emission factor converts activity, like kWh or litres of fuel, into kg CO₂e. Learn where factors come from, why they differ by country…
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What Is CO₂e? Carbon Dioxide Equivalent Explained
CO₂e, or carbon dioxide equivalent, is a single unit for comparing greenhouse gases by their warming effect. See how it is calculated, with examples.