Heather Mills has urged people to drink rats’ milk in a bid to save the planet.

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The outspoken vegan campaigner claims eating meat and dairy is destroying the Earth and insists the milk of rats, cats and dogs would be a more eco-friendly dietary choice.

The former model – who arrived at Speakers’ Corner in London’s Hyde Park in a petrol polluting 4×4 Mercedes yesterday (19.11.07) to give her lecture – ranted: ‘Why don’t we drink rats’ milk, cats’ milk or dogs’ milk? The startling truth is that animals farmed for meat and dairy are now one of the greatest threats to the planet.

‘The United Nations last year issued a shocking report on the environmental damage being done by livestock. I became a vegetarian for health reasons. Then I found out about the awful animal abuse in factory farms and dairy herds and became a vegan.

‘The easiest and most effective way of cutting our contribution is to change our diet and go vegan. It is that simple.’

Heather – who is currently involved in a bitter divorce battle with estranged husband Sir Paul McCartney – currently appears in two adverts for Vegetarians International Voice for Animals (Viva!) to encourage people to embrace a plant-based diet to save the world from global warming.

The adverts feature Heather demanding: ‘End your involvement in this vandalism overnight! Change your diet and change the world!’

Heather’s first ad’ features the line: ‘Hey Meaty, you’re making me so hot!’

The former glamour model – who lost her left leg below the knee in a motorbike accident in 1993 – appears in a second advert which plays on her disability, warning meat-eaters: ‘You haven’t got a leg to stand on!’

Viva! claim vegetarianism can halt the globe’s rising temperatures, which they claim are the result of the methane created by flatulent livestock.