Cheap?

The UK government repeatedly trumpet their 'world-leading' aspiration, to reach a Net Zero target for 'greenhouse gas' emissions, by 2050. Individuals and companies, connected to the oil and gas industries, reportedly donated just over £400,000 to the Conservative party, last year. Their donations came in just before ministers announced decisions on new licences for fossil fuel exploration in the North Sea. Licences for extracting more oil and gas were duly granted (https://www.theguardian.com/politics/2021/jun/24/oil-gas-donors-gave-over-400k-tories-before-north-sea-decision). £400k seems a pretty cheap purchase of a 'world-leading' aspiration. How much will the decision to inevitably increase 'greenhouse gas' emissions by this route, cost the country?