Residents' action group says there is a possibility of shortcomings in monitoring and enforcement.
As a loan of gas detecting equipment to schools in Pasir Gudang ends, an executive councillor hopes they will remain at 10 schools near the industrial area.
They say it's unfair to compare the two places as pollution levels in Sungai Petani are between good and moderate.
12 companies already charged so far, action against 14 more to be taken, says state corporation.
Bakar Abd Rahman says his wife died of heart failure and not because of the air pollution in Pasir Gudang as claimed in fake news being circulated online.
Executive councillor says the pupils experienced headache, nausea and vomiting, and were told to rest.
Menteri Besar Dr Sahruddin Jamal says a buffer zone may also be created between the industrial and residential areas.
The biggest problem is to convince the people of Pasir Gudang, and only YAB (Sahruddin) can calm them down, says state opposition leader Hasni Mohammad.
Menteri Besar Amirudin Shari said the state government had identified the location of the source of the pollution and the entity responsible.
The former prime minister says Zuraida and Yeo had previously given assurances that the area was safe and must be held accountable for inconveniencing the people.
Studies have shown that daily or lengthy exposure to acrylonitrile gas could cause cancer, says Zulkifli Abdul Rashid of UiTM.
Development must not come at the expense of the people's wellbeing, says PKR leader.
Safety and prevention briefings will be held at school assemblies tomorrow morning.
A mysterious smell that worsens at night, causes dizziness and affects breathing. Residents have become accustomed to all kinds of foul smell, which can be sickening, decaying or rancid.
Full analysis of water pollution at Sungai Semenyih expected to be released next week.
However, environment minister Yeo Bee Yin says high levels of gaseous methyl mercaptan were detected in the area.
Many problems that the people thought could be addressed with the change of government remain unresolved until today.
Authorities are also checking some 250 factories in Pasir Gudang to ensure they adhere to standard operating procedure.
State exco says all government agencies responded immediately after cases were reported on Thursday.
Schools and kindergartens in Pasir Gudang to be closed until Thursday.
Minister says the toxic waste area blamed for causing the Pasir Gudang air pollution had already been sent to the disposal centre.
Environment ministry says that the contractor had cleaned up waste from previous Sungai Kim Kim incident.
Reducing waste is becoming a global priority amid growing calls for more aggressive action on climate change and plastic pollution.
Lydia Ong of PTAS says there has been an increase in patients seeking treatment for respiratory illnesses while a five-year-old girl has been suffering from bronchitis since March.