Land trip to Oz to cut pollution

Ananova:
A woman is travelling 9,770 miles to be a bridesmaid at a wedding in Australia because she does not want to boost pollution by flying.
Barbara Haddrill's six-week journey will cost her £2,000, reports the Mirror.
She says it will produce only 1.4 tonnes of carbon dioxide instead of 5.2 tonnes if she flew.
She said: "I could never fly, it wouldn't be right. It's a challenge going overland. But it's worth it knowing I'm not harming the planet. I just hope I get to the church on time."
Barbara, 28, plans to travel 1,560 miles by bus to Moscow. From there, she rides the Trans-Siberian railway 3,600 miles to Beijing where she gets on a train for Singapore 2,770 miles away. Once there she boards a boat for final destination Brisbane 3,840 miles away.
Barbara, who lives in a caravan in a forest, works on alternative technology in Machynlleth, Powys.
She has not yet planned her journey back.
She vowed: "Definitely no planes. I'll find a different route."

Why doesn't the silly cow stay at home and not cause any pollution at all?
Has she considered the other factors of her journey that may cause pollution - like breathing?