Carbon taxes (as they exist now) are a con. You just buy some carbon credits from some company that is supposedly carbon-negative, because it plants forests somewhere so obscure that nobody checks.
And anyway, forests are not carbon-negative; all that lives must die. They're carbon-neutral.
We do not have carbon taxes, we have carbon credits. Carbon credits are at best green political theater. At worst they're an effective means for the carbon economy (coal, oil, gas) to deflect efforts to get a carbon tax on the table, as evidenced by comments like this one.
Carbon taxes, on the other hand, are an effective solution to global warming.
Carbon tax != carbon credits. Carbon credits are part of emission trading approach. Carbon tax doesn't need credits cause uses money. Not being cheatable is one of the advantages of carbon tax.
And anyway, forests are not carbon-negative; all that lives must die. They're carbon-neutral.