The Data Booklet may be used for this question. One important source of carbon dioxide in the atmosphere is the thermal decomposition of limestone, used in making cement and in producing lime for agricultural use. Cement works roast $1000$ million tonnes of limestone each year, and a further $200$ million tonnes are roasted in kilns to produce lime. Calculate the total annual mass output of carbon dioxide (in million tonnes) from these two processes.
- A440
- B527
- C660
- D880