I do not think that she is admirable. I think that she is a naïve young lady whose parents are taking advantage of her 15 minutes of fame. I acknowledge her passion for her cause. But it's foolish and, frankly, stupid, for uber-environmentalists to propose that we ditch almost all forms of transportation and go back to boats and bicycles.
Also, the odds are pretty good that a fair number of products that she, her friends, or her countrymen/women/people use are made in China. And China has some of the worst pollution around. So unless you're going to boycott everything made in China, then, well, I don't know what to say.
She acts like Armageddon is coming. Get a grip.