Sylvain Charlebois, senior director of the Agri-Food Analytics Lab at Dalhousie University in Halifax, told CTV's Your Morning on Tuesday that avocado production is linked to a loss of biodiversity, water shortages and deforestation. According to the Water Footprint Network, a single avocado requires nearly 230 litres of water to grow, compared to an orange that needs about 50 litres, or a tomato that requires 13 litres.