Heather Mills, former Beatle Paul McCartney's estranged wife claimed that 80% of global warming comes from livestock and deforestation. To save the planet, she has a pretty specific suggestion: drink rats' milk!
Ms Mills said that livestock created far more carbon emissions than transport, so we should go vegan - someone who eats no meat or dairy produce - or at least find something else to put in tea or coffee.
At Speakers Corner in Hyde Park, central London, she said: "There are many other kinds of milk available. Why don't we try drinking rats' milk and dogs' milk?"