A public smear campaign, death threats, and threats of sexual violence, have prompted leading Australian climate scientists to take drastic measures to secure their safety. According to The Guardian, several scientists at the Australian National University in Canberra were transferred to a secure facility following a deluge of threatening emails and phone calls. The threats “were so serious and so explicit that the Australian Federal Police have been called in to investigate,” The Telegraph reports. This is the latest chapter in a bitter argument raging in Australia since last February, when the prime minister proposed a tax on carbon emissions. The tax, which is fiercely opposed by the mining and petroleum industries, is designed to stave off the disastrous consequences of climate change—among other things, a predicted one-meter rise in sea level. But the tax legislation has yet to garner strong support from the public, who fear it will stunt economic growth. The debate escalated to new heights last week with the airing of a pro-tax ad starring Oscar-winning actress Cate Blanchett.