import type { Scope2EmissionsInput, Scope2EmissionsResult } from './types.js';
/**
 * Calculate Scope 2 (indirect) CO2 emissions from purchased electricity
 *
 * @formula CO2(kg) = kWh × gridFactor / 1000
 * @reference GHG Protocol Scope 2, IEA Emission Factors 2023
 * @throws {RangeError} customFactor is required when region is "custom"
 * @param input - Electricity consumption and grid region
 * @returns CO2 emissions in kg and tonnes
 */
export declare function scope2Emissions(input: Scope2EmissionsInput): Scope2EmissionsResult;
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