Meat free Monday's is an ideal way to contribute to awareness of the detrimental environmental impacts of industrial fishing and animal agriculture. The initive was launched by Paul, Mary and Stella McCartney in 2009 and is a not-for-profit organisation, it encourages people to have one meat free meal day per week, aiming to have at least one plant based day per week. It is a great start for many people who don't want to commit to full time vegetarian.