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Birds rely on smell to find their bearings when land is out of sight, according to a study.

A study finds that accelerated growing conditions on some fish farms are causing hearing impairments in salmon. It’s a reminder that aquaculture’s own accelerated rise needs to be closely managed

To grasp the wide-ranging impacts of our industrial food systems, take a peek inside a salmon’s ear. That’s what marine biologist Tormey Reimer did when, in 2013 at the University of Melbourne, she began to investigate deformities that were developing on the structures that salmon use to hear.

Bony fish species have structures called otoliths in their ears, small crystals that they use to detect sound. Biologists have for decades relied on otoliths to age fish, using them like rings on a tree. But what Reimer saw was an altogether larger, lighter, and more transparent crystal called a vaterite, growing into the otolith and obstructing the fish’s ability to hear. “I did a bit of digging and found it was much more common in farmed salmon than wild,” she says. And, she began to suspect it had something to do with the accelerated growth rates in fish farms.

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This year, China’s government enacted a ban on ivory sales and started closing down carving workshops. How did such an astonishing U-turn come about?

For years Chinese government officials were followed around the world, at every meeting, by a single issue: the scores of dead elephants across Africa, and the international community that blamed China for this “ivory “holocaust”.

Even the Chinese premier, Li Keqiang, could not escape lectures on poached elephants and the evils of China’s legal domestic ivory trade from foreign leaders. For years, China deflected the criticism with claims of a long cultural heritage and incremental policies, such as a ban on ivory carving imports two years ago.

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China has made incredible economic progress and is now making efforts to create a rigorous environmental law framework. But according to Amnesty International, some human rights lawyers who fall foul of the government do not receive fair trials.

The anti-cycling backlash in the media in the aftermath of Charlie Alliston trial suggests roads and streets overrun by dangerous cyclists, but is this true?

When cycling reaches newspaper front pages it’s usually the sporting kind. The last couple of weeks have been an exception, with blanket coverage of the trial of Charlie Alliston, convicted last week over the death of Kim Briggs after he struck her on his bike.

This piece isn’t about the facts of this very tragic case. It’s about the aftermath, more specifically the repeated call in some part of the media for something to be done about what these articles believe is a particular problem of reckless and law-flouting cyclists.

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No-one wants to invest in new baseload power. It makes no economic, or environmental sense. Deep down, Malcolm Turnbull understands this, but does he have the courage of his convictions, if that is what they were, to overcome the nonsense from the conservative ideologues?

Report says WA's Pilbara must first establish local solar industry if it wants to offer Indonesia competitive rates on PV generation.

Claxton, Norfolk Lined up on the telephone wires, they stretch, preen and snooze, riding the tide swell of air

The view from my office includes a junction box where five telephone wires converge at the top of a pole. For several years, it has been a favourite gathering place for the season’s young swallows and they wreathe this banal technology in the joyous rhythms of their movements and sounds.

The immatures are separable by pale fringes to their wing feathers, but also by the downturned yellow gape-lines at the corners of their mouths, which give them a wonderfully comic clown-like glumness. It is as if all the swirl of these late-August days – the balletic fly-snatching, the sun-blessed leisure, the quiet feather care as they sit amid a pool of the adult swallows’ desultory song – were a source of strange ennui.

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AGL tells customers of its ground-breaking "virtual power plant" in Adelaide that their installation will be delayed while it reviews its technology choices for the program.

AER's proposed demand management incentive scheme that could deliver flexible capacity equivalent to equal half the now closed Hazelwood power generator.

La Trobe University Bendigo student Kirra Coventry filmed her group of outdoor and environmental education classmates helping a koala that had become stranded by rapidly rising water in the Murray river. The students were learning to be river guides when they saw the koala on the edge of Ulupna Island. The students told associate lecturer Chris Townsend it was low in a tree and seemed to be trying to find dry land. They pushed an empty canoe out to it and it climbed aboard, took a seat, then disembarked once it reached shore, where it had a lengthy drink. Townsend said koalas, which are considered a vulnerable species in parts of Australia, were relocated to river islands like Ulupna in the late 1980s and there was now a healthy population there. ‘Koalas are very, very fussy about the trees they will feed in and live in,’ he said. ‘Obviously leading up to this it had found the perfect tree, but I think the floodwaters came up a little bit quickly and it didn’t have time to get down’

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Queensland's 400MW reverse auction for renewables and energy storage has been flooded with interest.

The IEA energy statistics underestimates the role of wind and solar in the world’s energy mix - by a factor of three. Here's why.

Vector will be expanding its energy storage options for residential, industrial, and commercial customers, starting with LG Chem’s battery storage products.

Specialist power and water consulting firm Entura has been appointed by Delta Electricity to provide engineering services to support the development of the proposed Vales Point power station solar farm.

Captain Paul Watson accuses ‘hostile governments’ in the US, Australia and New Zealand of being in league with Tokyo

The anti-whaling vessel Sea Shepherd will not contest the Southern Ocean against Japanese whalers this season, Captain Paul Watson has announced, accusing “hostile governments” in the US, Australia and New Zealand of acting “in league with Japan” against the protest vessel.

Sea Shepherd has been obstructing Japanese whaling vessels in the Southern Ocean each year since 2005, but Watson said the cost of sending vessels south, Japan’s increased use of military technology to track them, and new anti-terrorism laws passed specifically to thwart Sea Shepherd’s activities made physically tracking the ships impossible.

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Tesla and LG Chem are leading the battery storage market in terms of brand recognition, but the issue of quality throws up some other names.

"Australia's pretty much in league with Japan on allowing this to continue."

The Amazon is the largest rainforest in the world. Author provided

The Amazon, often described as the “lungs of the Earth”, is the largest rainforest in the world. Its extraordinary biodiversity and sheer scale has made it a globally significant resource in the fight against climate change.

But last week the Brazilian president Michel Temer removed the protected status of the National Reserve of Copper and Associates, a national reserve larger than Denmark.

The reserve, known as “Renca”, covers 46,000 square kilometres and is thought to contain huge amounts of copper, as well as gold, iron ore and other minerals. Roughly 30% of Renca will now be open to mining exploration. Renca also includes indigenous reserves inhabited by various ethnic communities living in relative isolation.

The decision, which has been denounced by conservation groups and governments around the world, comes as the unpopular Temer struggles with a crushing political and economic crisis that has seen unemployment rise above 12%.

Read more: With Dilma Rousseff impeached, Brazil is set for years of political turmoil

Political and economic turbulence

Brazil is currently in the middle of the largest corruption scandals in its history. Since 2014, an ongoing federal investigation called Operation Car Wash has implicated elite businesspeople and high-ranking politicians, uncovering bribes worth millions of dollars exchanged for deals with the state oil company Petrobas. According to the BBC, almost a third of President Temer’s cabinet is under investigation for alleged corruption.

There is no doubt that Brazil needs to find ways out of recession and unemployment. As the minister of mining and energy has said, “the objective of the measure [to allow mining] is to attract new investments, generating wealth for the country and employment and income for society.”

However it’s not clear that this move will benefit ordinary Brazilians. This is not the first gold rush into this area, and the Amazon still has high indices of poverty and many other challenges.

During the 1980s and 90s tens of thousands of miners flocked to gold deposits in the Amazon, driven by high international prices. One of the most famous examples, “Serra Pelada,” saw 60,000 men dig a massive crater in the Amazon Basin.

These mining operations typically provided little economic benefits to the local populations. Instead, they attracted thousands of people, which led to deforestation, violent land conflicts and mercury pollution in the rivers.

In reality the Amazon and its people deserve a sustainable model of development, which takes advantage of the outstanding biodiversity and beauty of its standing forests. The historical record shows mining is likely to lead to a demographic explosion, and further deforestation, pollution and land conflicts.

The principle of non-regression

One important aspect of international environmental law is called the “principle of non-regression”. The principle states that some legal rules should be non-revokable in the name of the common interest of humankind. Essentially, once a level of protection has been granted there is no coming back.

This principle is reflected in article 225 of the Brazilian constitution, which lays out the right to a healthy environment:

All have the right to an ecologically balanced environment […] and both the Government and the community shall have the duty to defend and preserve it for present and future generations.

The Brazilian constitution also describes the Amazon forest as a “national heritage”. It must then be treated accordingly.

Read more: Deep in the Amazon jungle, Brazil’s ‘hidden cities’ are in crisis

While the Amazon is a fundamental part of Brazil’s history, it’s also an essential part of the global battle against climate change. The Amazon contains half the worlds’ tropical rainforests, and its trees absorb and store vast amounts of carbon dioxide.

According to the Intergovernmental Panel on Climate Change, land use, including deforestation and forest degradation, is the second-largest source of global emissions after the energy sector.

Developed countries around the world have committed resources to help Brazil offset the costs of safeguarding their forests. One example is the Amazon Fund, created in 2008. It has received billions of dollars from foreign governments such as Norway and Germany, to combat deforestation and to promote sustainable practices in the Brazilian Amazon.

But with 14 million Brazilians unemployed, further assistance is required to ensure that they can protect their forests.

As well as governments, companies have also committed billions of dollars to fight climate change and support projects that reduce carbon emissions and promote energy efficiency. Most businesses have also created self-regulatory standards to ensure compliance with international laws and ethical standards.

The decision of the Brazilian government leaves us with two questions. How will the international community honour their commitments to keep global warming below 2℃, if countries begin rolling back their environmental protections? And how will companies involved in mining projects in the Amazon honour their social responsibility commitments and moral obligation towards present and future generations?

The degradation of the Amazon will affect the entire world. The clearing of the Amazon for mining will lead to the emissions of thousands of tons of greenhouse gases, furthering global warming and causing the irreversible loss of biodiversity, and water resources, as well as damage to local and indigenous communities.

Let us not take a step back towards more destruction. Rather, let us strengthen the protection of our remaining forests.

I have previously received funding from Swiss Foundations to conduct my Masters, PhD and book publication. Recently, I received funding from the School of Law, Western Sydney University, to conduct research on illegal logging. I am a Member of the World Conservation Union (IUCN) Commission on Environmental Law

Study predicts power consumption to rise with hotter temperatures, increasing need for renewable sources, while northern Europe’s demand may fall

Demand for electricity is set to soar in southern Europe as climate change takes hold, research has revealed, with the effect likely to be down to a boom in the use of air conditioning.

By contrast, electricity demand is expected to drop in northern countries, leading to an increasingly polarised pattern across the continent – a situation, the researchers say, that bolsters the case for greater integration of electricity supplies across Europe, particularly given the shift to renewable energies.

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