Dr Mahathir Mohamad's weekend visit to Kuching will have no impact on politics in the Sarawak, said Parti Pesaka Bumiputra Bersatu Sarawak (PBB) supreme council member Wan Junaidi Tuanku Jaafar.

"It has no impact at all. He only caused a negative impact to the opposition," Wan Junaidi, the state’s natural resources and environment minister, said at a press conference in Kuala Lumpur today.

He said that Mahathir and PKR de facto leader Anwar Ibrahim did not contribute to Sarawak when prime minister and deputy prime minister respectively.

"When Mahathir was the prime minister, he gave nothing to Sarawak, he talked only.

"(It was the same for) Anwar. He promised to build 31 schools in Sarawak with half a billion of ringgit, but not a single sen was given to us," he said.

Citing a meeting with BN backbenchers chaired by Anwar, Wan Junaidi said Anwar rejected any increase in the allocations for MPs on minor projects in the state.

"I am a mature man. He threw a file at me and said: 'We cannot send all the money to Sarawak'. I kept quiet for 20 over years," Wan Junaidi said.

Asked about the sizeable turnout at the Pakatan Harapan ceramah in Kuching last night, he argued that an 8,000 strong turnout was not considered big.

"We had a larger crowd in the 2013 (general) election, and I obtained a bigger majority.

"Some were curious to listen to what kind of rubbish came out from his (Mahathir's) mouth," he said.

"I have no intention to insult (anyone). But when you were the prime minister, and you had all the authority to do one thing, why you didn't do it? We had been shouting and yelling for the Pan-Borneo Highway in Parliament (to no avail)" he said.

Wan Junaidi also took a jab at Sarawak DAP leader Chong Chieng Jen for accusing him of giving up Sarawak's rights by tabling the Access to Biological Resources and Benefit Sharing Bill 2017 – which regulates the use of biological resources in accordance to the provisions of the Convention on Biological Diversity (CBD).

"Chong should read the bill. If he doesn't understand the bill, he may seek explanation from the Sarawak Attorney-General.

"We will not take anything away from Sarawak under the bill. The only reason we included both Sabah and Sarawak in the bill is because we have the obligation of protecting the states' biodiversity," he said.

Sarawak's own biodiversity law is not recognised by the CDB, as the state is not a signatory.

The bill, which was passed in the last session of Parliament, will now allow Sarawak to file an international complaint if any biodiversity rights are stolen from the state, the minister claimed.