/**
 * Calculate CO2 emissions for energy consumption
 * @param kwh - Energy consumption in kilowatt hours
 * @returns CO2 emissions in kg
 */
export declare function co2PerKwh(kwh: number): number;
/**
 * Calculate AC usage for given area and hours
 * @param m2 - Area in square meters
 * @param hours - Usage hours
 * @returns Energy consumption in kWh
 */
export declare function acUsage(m2: number, hours: number): number;
/**
 * Calculate CO2 emissions for AC usage
 * @param m2 - Area in square meters
 * @param hours - Usage hours
 * @returns CO2 emissions in kg
 */
export declare function acCo2Emissions(m2: number, hours: number): number;
/**
 * Get data source for energy emissions
 * @returns Data source reference
 */
export declare function dataSource(): string;