Business standalone; Brian McCarthy, checks the salads and herbs growing on the growtowers within the polytunnel on the roof at the Cork Rooftop Farm shop on (the Coal Quay) Cornmarket Street, Cork. Micro-greens, salads and herbs are grown on the roof of the city centre premises and a new 'Zero Waste' wholefoods section has recently been added to the store. The water usage for the soil-free growtowers is typically just 10% of 'normal' soil-grown crops. Pic: Larry Cummins