The UK's Advertising Standards Authority (ASA) is to release new guidance to ensure ads don't mislead people about the environment.
It found there's currently "significant scope" for firms to make mistakes, reports BBC.
The ASA will also commission research into carbon neutral and net zero promises made in ads.
The review will be "shining a greater regulatory spotlight" to make sure firms are socially responsible when considering environmental issues.
Food company Gousto were also found to have made false claims that their packaging was "100% plastic free and recyclable" after an ASA ruling last year.