One bag of cement weighs around 25 kilograms, and one cubic metre of portland cement weighs approximately 1500 kg, or 1.5 tons, hence the volume of a 25kg bag of cement is 25/1500 = 0.0166 cubic meters. This means that there are about 6.6 million milliliters in a cubic meter of cement. The density of cement powder is 3 kilos per cubic meter, so the volume of a cubic meter of cement is 30000 ml or 33 gallons. This means that there are approximately 9.5 billion grams in a ton of cement. A standard bag of cement has an average mass of 50 grams, or 0.05 kilogram, therefore there are 4500 bags in a ton of cement. In Canada, one bag of cement costs $7 to $9, meaning the cost of one ton of cement is $42,000 to $54,000. In India, one bag of cement is never more than $3, so the price of one ton of cement is $27,000. Cement production uses a large amount of energy. One ton of cement requires 2200 kJ of heat, which comes from burning fossil fuels such as oil and natural gas, plus some waste heat from other processes. Cement manufacturing also produces significant amounts of carbon dioxide, water pollution, and sulfur dioxides.