Bindi Irwin, star of Bindi's Bootcamp on ABC3, upset over handling of her article. Picture: supplied Source: news.com.au

The 14-year-old wildlife campaigner said she was "saddened" and "frustrated" after being forced to withdraw a 1000-word essay she wrote on the overpopulation of the planet for Secretary Clinton's e-journal.

After spending hours of "school time" writing the piece for the Go Wild - Coming Together for Conservation edition last month, it was drastically edited before Bindi withdrew it in protest.

"When I got the essay back after they edited it, it was completely different. I hadn't said anything they had put in ... my words were twisted and altered and changed. I was a little bit shocked to tell you the truth," she said.

"I was really sad and I think it was more frustration because I'm trying so hard to get the message across and I guess some people don't want to listen.

The true test of freedom of speech is when someone says something you don't like."

But the daughter of the late Crocodile Hunter Steve Irwin vowed to continue to speak out about population issues even if it makes her unpopular.

"When I bring up population with people they just want to change the subject," she said.

"I think it's nice if we can just start talking about it.

"I don't believe there's any one solution for our population crisis but I think if we're able to open up the Pandora's Box and start discussing it change can be made."

Bindi said she wrote the essay, urging people to discuss population by using the simple analogy of throwing a party and having too many guests turn up, after discussing population with entrepreneur Dick Smith.

"I really sat down and thought about what messages I wanted to get across, what I talked about with Dick Smith and my own experiences," she said.

"I sat down on my own and wrote the entire thing myself. I just used the resources I had around me for specific facts and then wrote it from my heart. The essay is me.

"I got it down to 1000 words and read it to mum and we sent it through, so you can see why after all that work it was a little bit devastating."

Despite her disappointment, Bindi who said it was "important to stand up for what you believe in" said she would still consider contributing to the e-journal in future.

"I haven't heard back but hopefully in the near future I might hear from them," she said.

"It hasn't damaged my admiration for Hillary Clinton. I would love to see her running for president one day because she's doing a really great job.

"I'd like to keep the option open but I would have loved it if they'd reconsidered," she said.

"As I'm growing up I hope to be able to start tackling these bigger issues facing our world."

Read the original story and Bindi's essay