> It would be more effective in curbing emissions if it were higher, she said

https://phys.org/news/2020-01-british-carbon-tax-coal-fired-...

There is at least some evidence of success in the UK (combined with other policy + economic reality). Our climate policy is probably the only thing the government have done well recently - dwarfed by the impending iceberg of Brexit.

Your article specifically says that emissions would have risen faster without the carbon tax.

The article also clearly mentions that the ineffectiveness is caused by the fact that the carbon tax is too low.

Come on if you're going to link an article then don't pick one that is showing a different picture than your comment. All it showed is that governments refuse to implement effective policies, not that the concept of a carbon tax itself is flawed.

I'm reading the article, and one of the researchers (Dinara Millington) suggests increasing the Carbon Taxes to make them more effective.

Exactly: researchers promoting policy. This why people are sceptic.