New Delhi, Feb. 24 -- Farmers drove tractors into central Paris on Friday to bring fresh pressure on President Emmanuel Macron, who promised them a meeting to discuss their grievances but then cancelled the event. French farmers have been part of a Europe-wide movement against environmental rules and competition from cheap imports from outside the European Union, and to protest low incomes. They have demanded a response from the government by the time the popular national agricultural fair, the Salon de l'Agriculture, opens Saturday in Paris. "The idea was to add a little bit of pressure before the fair opens," said Damien Greffin, a cereal farmer and Paris region chief of the main farmers' union FNSEA. Farmers staged nationwide protests la...