Ecological hazard

More than two dozen pilot whales have died amid a mass stranding on a beach near Dunsborough on Western Australia's coastline.
Four pods of up to 160 whales are spread across 500 metres of coastline at Toby's Inlet on April 25, according to the state's Parks and Wildlife Service.
"Unfortunately, 26 whales that stranded on the beach have died," the service said.
"There are 20 whales in a pod about 1.5km offshore. Another pod of about 110 animals are together closer offshore."
Wildlife officers, marine scientists and veterinarians have converged on the beach and are assessing the conditions of the stranded whales.
It comes two hours after the stranding was first reported and the public has now been asked to keep clear of the site.
"While we appreciate the strong desire to help, the area has become overcrowded with volunteers who are impacting on authorities attempting to mobilise a response," WA Police said.
Dunsborough & Busselton Wildlife Care Inc reiterated the message for people to stay away.
"The public are now hindering procedures and lots of dogs and kids causing more problems," the organisation said on Facebook.
"We will ask for help as and when needed."
A shark advice has been issued with the possibility the stranded whales could attract sharks closer in to shore along the stretch of coast.
It comes after nearly 100 long-finned pilot whales died in a mass stranding in June 2023 at Cheynes Beach, near Albany in WA.
Despite the intervention of hundreds of volunteers, wildlife experts and authorities the pod could not be saved.
In 1996 the state's biggest mass stranding happened at Dunsborough involving 320 long-finned pilot whales.
Only 20 whales died with 300 able to be released.
People who would like to help in the stranding at Toby's Inlet have been asked to contact the Parks and Wildlife Service at Busselton.