Rhode Island has seen an explosion in the number of farmers markets — from just 15 in 2004, the number has grown to 55 this year. The markets connect farmers to customers and stimulate the local economy, but are there too many markets? Is their growth sustainable? ecoRI News speaks with Bevan Linsley, market manager for the Aquidneck Growers’ Market and Coastal Growers’ Market, and Sarah Lester, markets coordinator for Farm Fresh Rhode Island.