Trend in heating degree days in the EU-27 (1980 - 2009). Eurostat calculates heating degree days as (18 °C - Tmean) if Tmean is lower than 15 °C (heating threshold) and zero if Tmean is greater than or equal 15 °C; Tmean is the mean daily outdoor temperature, calculated as Tmean = (Tmin + Tmax / 2)
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If you run a business and need to deliver mail and parcels regularly around town, use a bicycle courier service if one is available. Bicycles bypass traffic; are quick; and you will contribute to the improvement of urban air quality in your area.
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