The spokesman said the approval process for mining projects was extensive and transparent. It includes public consultation, environmental impact studies and strict conditions to protect the environment. Mine lease applications must also meet public interest requirements.

The mines minister for Queensland, Anthony Lynham, was on vacation and was not available for comment. Adnani officials did not respond to a request for comment.

The Adani case was just one example cited in the report.

Two oil companies, Beach Energy and Linc Energy, and the mining companies Karreman Quarries and New Hope Coal also made donations, according to the report, which says the companies received favorable treatment in return. Another company, Sibelco, spent money campaigning to support its sand mining operations ahead of the state election.

A spokeswoman for Sibelco, Helen Stanley, said the company had made no direct donations to political parties but had funded an electorate campaign in support of its sand mining operations on North Stradbroke Island. She said the campaign was run in 2013. In 2015, the Palaszczuk government said it would end sand mining on the island by 2019.

Beach Energy, Karreman Quarries and New Hope Coal did not respond to questions. Linc Energy is in receivership, a company spokeswoman said, adding she could not answer questions about the company’s political donations policy.

Over all, the report said, the Queensland Liberal National Party received more than $700,000 in donations from mining companies from 2011 to 2015. The mining industry also donated nearly $2.2 million to the federal Liberal Party of Australia, which now leads the national government, in the five years since July 2011. The Queensland Liberal National Party and the Liberal Party of Australia are not one and the same.