Men in action: Dengue is common during rains as the mosquito that causes it breeds only in water collected in containers and small water bodies. Mayor M. Subramaniam began a drive of collecting unused tyres all round the city, last week. As per his instruction, Corporation workers in many of the zones have swung into action to complete the job. On an average they have been collecting about 1.5 tonnes of unused tyres daily. The photo shows corporation personnel collecting the unused tyres from Mylapore and R.A. Puram areas.