By by Roberta Harrington Kraft Heinz, known for its ketchup, is investing millions of dollars in researching tomatoes that can withstand the climate crisis. The company’s $5 bn Heinz Ketchup brand is not yet in danger but California – where the tomatoes for its US-produced ketchup are grown – has just had its hottest summer yet. California in fact produces more than 90% of US tomatoes used in sauces and pastes. Kraft Heinz produces 660mn bottles of ketchup yearly, 300mn of them in America. This comes after Burger King and McDonald’s in India took tomatoes off their menu last year, creating a t…