There are reports that oil, coal and gas industries in America have invested more than half a billion dollars on lobbying against acting on climate change. In Australia there are more than 540 'registered lobbyists, + many more unregistered. So I'm wondering how many of these are in the oil, coal and gas business, and how much do they spend on their lobbying?
1 Answer
This article tackles some very similar to what your asking and I think it provides an insight into the order of magnitude of Australian anti-climate-change lobbying spending:
The five largest global oil companies – ExxonMobil, Shell, Chevron, BP, and Total – have spent a combined $US1 billion ($1.44 billion) on “misleading climate-related branding and lobbying” in the three years since the Paris Agreement was signed, according to research from InfluenceMap.
The same article provides a small graph to have a visual representation:
While this certainly does not cover your question entirely, $US1 billion is a very rough figure to understand the size of the lobby in oil, coal and gas business related to climate change.