Protecting 1.2% of Earth Would Prevent Most Extinctions, Study Says 

Mexican gray wolves, an endangered native species, are seen resting in their enclosure at the Museo del Desierto in Saltillo, Mexico July 1, 2020. Picture taken July 1, 2020. (Reuters)
Mexican gray wolves, an endangered native species, are seen resting in their enclosure at the Museo del Desierto in Saltillo, Mexico July 1, 2020. Picture taken July 1, 2020. (Reuters)
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Protecting 1.2% of Earth Would Prevent Most Extinctions, Study Says 

Mexican gray wolves, an endangered native species, are seen resting in their enclosure at the Museo del Desierto in Saltillo, Mexico July 1, 2020. Picture taken July 1, 2020. (Reuters)
Mexican gray wolves, an endangered native species, are seen resting in their enclosure at the Museo del Desierto in Saltillo, Mexico July 1, 2020. Picture taken July 1, 2020. (Reuters)

Setting aside an additional 1.2% of the world's land as nature preserves would prevent the majority of predicted plant and animal extinctions and cost about $263 billion, according to a study published on Tuesday.

The world is racing to meet a goal to protect 30% of the world by 2030 to protect wildlife that is being decimated by climate change, pollution and habitat destruction.

Global policymakers will meet at a United Nations summit in Colombia in October to discuss plans for reaching that goal.

The study in the journal Frontiers in Science aimed to identify the highest value areas in hope that they be included in those protection plans, said Carlos Peres, a study co-author and conservation ecology expert at the University of East Anglia in the United Kingdom.

"Most countries do not actually have a strategy," Peres said.

"The 30-by-30 targets still lack a lot of details because it doesn't actually say what 30 percent should be protected."

The study's proposed protections would cover an additional 1.6 million square km (633,000 square miles) - an area about a fifth the size of the United States - across 16,825 sites globally that are home to rare and threatened species.

That's on top of the nearly 16% of the world that already have some level of protection.

The study estimated the $263 billion bill is how much it would cost to acquire the new areas, many of which include private property, at current value over the next five years.

"Time is not on our side because it will become increasingly more expensive and more difficult to set aside additional protected areas," Peres said.

Land acquisition makes up most of the cost of creating protected areas, and the study did not consider the upkeep costs for policing the reserves.

About three-quarters of the sites are tropical forests, as those are the world's most biodiverse ecosystems. The Phillipines, Brazil and Indonesia are home to more than half of the high-value sites.

Russia is the single country with the most high-valued area ripe for conservation with 138,436 square km identified in the study, an area the size of Greece.

Several African countries also topped the list with Madagascar having the fourth-highest number of sites overall while the Democratic Republic of Congo had the largest area targeted for conservation on the continent.

The United States is the only developed nation among the top 30 countries in the analysis, with 0.6% of the sites or an area twice the size of Delaware.

The researchers only considered land and freshwater ecosystems but not oceans or marine protected areas. Researchers did not include invertebrates in the study, as the geographical distributions insects and other such animals are not well mapped.



Bull Sharks Linger in Warming Sydney Waters

A man watches large waves on Bondi Beach in Sydney on July 2, 2025, as large swells and high winds hit the east coast of Australia. (Photo by SAEED KHAN / AFP)
A man watches large waves on Bondi Beach in Sydney on July 2, 2025, as large swells and high winds hit the east coast of Australia. (Photo by SAEED KHAN / AFP)
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Bull Sharks Linger in Warming Sydney Waters

A man watches large waves on Bondi Beach in Sydney on July 2, 2025, as large swells and high winds hit the east coast of Australia. (Photo by SAEED KHAN / AFP)
A man watches large waves on Bondi Beach in Sydney on July 2, 2025, as large swells and high winds hit the east coast of Australia. (Photo by SAEED KHAN / AFP)

Bull sharks are lingering off Sydney's beaches for longer periods each year as oceans warm, researchers said Friday, predicting they may one day stay all year.

The predators are migratory, swimming north in winter when Sydney's long-term ocean temperatures dip below 19 degrees Celsius (66 degrees Fahrenheit) to bask in the balmier waters off Queensland.

A team of scientists looked at 15 years of acoustic tracking of 92 tagged migratory sharks in an area including Bondi Beach and Sydney Harbour.

Records show the sharks now spend an average of 15 days longer off Sydney's coast in summer than they did in 2009, said James Cook University researcher Nicolas Lubitz.

"If they're staying longer, it means that people and prey animals have a longer window of overlap with them."

Shark attacks are rare in ocean-loving Australia, and most serious bites are from three species: bull sharks, great whites, and tiger sharks, according to a national database.

There have been more than 1,200 shark incidents around Australia since 1791, of which over 250 resulted in death.

Researchers found an average warming of 0.57C in Bondi for the October-May period between 2006 and 2024, said the study published in the peer-reviewed journal Science of The Total Environment.

Over a longer period, remotely sensed summer sea-surface temperatures in the area rose an average 0.67C between 1982 and 2024, they said.

"If this trend persists, which it likely will, it just means that these animals are going to spend more and more time towards their seasonal distributional limit, which currently is southern and central New South Wales," Lubitz said.

"So it could be that a few decades from now, maybe bull sharks are present year-round in waters off Sydney," he added.

"While the chances of a shark bite, and shark bites in Australia in general, remain low, it just means that people have to be more aware of an increased window of bull shark presence in coastal waters off Sydney."

Climate change could also change breeding patterns, Lubitz said, with early evidence indicating juvenile sharks were appearing in rivers further south.

There was some evidence as well that summer habitats for great whites, which prefer colder waters, were decreasing in northern New South Wales and Queensland, he said.

Tagged sharks trigger an alarm when they swim within range of a network of receivers dotted around parts of the Australian coast, giving people real-time warnings on a mobile app of their presence at key locations.