here we go, page-6

I am amazed that some people here can talk any common sense on the Carbon Tax when it seems you don't understand the concept of how it works.

It’s not limit to 500 companies that just a rough number of those companies that will need to pay it under the criteria set out. It could be 490 or 520 etc.

I'm suprised that some you can feed yourselfs.

Get educate and then come back with a more informed opinion. It might not change how you feel about it but a least you will have some idea what you are talking about.

"The 500 companies are not an identified list. The figure of 500 is just an estimate of how many companies in Australia would be caught by the scheme's eligibility rules."

"Here's how it works: any company which has a facility (plant, factory, premises or similar) directly emitting more than 25,000 tonnes of carbon a year will be forced to cough up $23 a tonne for that pollution."

http://www.abc.net.au/news/2011-07-12/the-great-carbon-tax-secret-who-are-the-misfortune/2790974