More than 100 schools in Malaysia have been closed a week after toxic waste was dumped into a nearby river, causing hundreds of people including scores of schoolchildren to fall ill, authorities said.A truck is believed to have dumped the waste in the south of Johor state last week, sending hazardous fumes across a wide area and causing those affected to display symptoms of poisoning such as nausea and vomiting.Some 500 people, many of them school pupils, have received medical treatment after…
