Environmentalists also blame palm oil cultivation for deforestation in southeast Asia.
French junior ecology minister said on June 11, as farmers blocked refineries across the country in protest against use of the vegetable oil in biofuels, that France will commit at European Union level to freeze the use of palm oil.
The protests are a sign of growing anger in France's farming communities which have so far not mobilised in large numbers against the government of President Emmanuel Macron since his election.
Stephane Travert said the government will not back down on its decision to allow Total to use imported palm oil.
The firm, which operates five of France's seven refineries, nine depots, and 2,200 petrol stations, said the depots and four refineries were still blocked.
Total has invested 275 million euros ($324 million) to transform La Mede refinery into a plant that can make 500,000 tons of biodiesel per year. "It concerns South American meat and Spanish wine as well as palm oil", said Damien Greffon, who leads the FRSEA farmers' union in the Paris region.
Fuel shortages were not expected as a result of the blockade, given France's network of emergency fuel reserves and in the absence to date of sympathy action by fuel sector workers.
French authorities last month gave Total permission to use palm oil as a feedstock at its La Mede biofuel refinery in southern France, infuriating farmers who grow crops such as rapeseed.
Last year, the number of French farm bankruptcies rose by 7 percent. Union president Lambert attributed them to continuous downwards pressure on prices, compounded by surging environmental and health norms.
Lambert told Franceinfo that the blockades were meant to pressure the French government over recent trade agreements that would allow imports of meat, sugar, and ethanol from countries "that do not respect the same conditions of production as French products".