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More than 30% of the water sources on our planet are being over-exploited, in many cases to near exhaustion. World Water Week brings together experts and innovators from around the world to develop solutions for a sustainable water future

• This year World Water Week takes place in Stockholm, 28 Aug to 2 Sept, and takes the theme of Water for Sustainable Growth

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Joan Rose, a microbiologist who has won the world’s most prestigious water prize, is both depressed and optimistic at progress to make water fit to drink

• World Water Week - in pictures

In May 2000, around half of Walkerton’s 5,000 residents fell severely ill and seven people died when cow manure washed into a well. The extent of the water pollution in the small Canadian town was concealed from the public, people drank from their taps and the result was ruined lives.

For academic microbiologist Joan Rose, who has observed water pollution outbreaks around the world, it was the worst that she had ever experienced.

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Wet spring and sunny conditions pave the way for a spectacular display of colour, according to the Forestry Commission

Autumn could come as early as mid-September as a wet spring and sunny conditions pave the way for a spectacular display of colour, the Forestry Commission has said.

England’s wet spring saw rainfall 30% above average in the east and the south, data from the Met Office shows.

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Special review recommending steps needed to strengthen climate policies receives a mixed response

The Climate Change Authority has advised the Australian government to institute two emissions trading schemes and strengthen regulations in order to meet Australia’s 2030 emission reduction targets and to allow it to lift those targets in line with international climate change obligations.

The move is expected to put pressure on the new environment and energy minister, Josh Frydenberg, to strengthen Australia’s climate policies but it has received a mixed response.

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Over the past 70 years, the bird has become a global staple, and could be the key fossil evidence for human-influenced epoch

The domestic chicken is set to play an epoch-defining role for humanity, as its bones could become the key fossil evidence for the dawn of the age in which humankind came to dominate the planet.

On Monday, an expert group announced that a new geological epoch, the Anthropocene, should be declared. But the key to defining a geological age is finding global physical evidence of the transition that will be preserved for future geologists, and the chubby modern chicken eaten worldwide is a prime candidate.

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New study finds poaching has helped shrink population by 60% since 2002 – and eventually may be responsible for eradicating one of the largest creatures left

Forest-dwelling elephants are likely to face extinction far more quickly than previously assumed because their sluggish reproduction rate cannot keep pace with rampant poaching and habitat loss, a new study has found.

The first comprehensive research into forest elephant demographics found that even if poaching was curbed, it will take nearly 100 years for the species just to recover the losses suffered in the past decade. The forest elephant population has crashed by more than 60% since 2002, with the species now inhabiting less than a quarter of its potential range of the Congo basin in Africa.

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It may not be coal for Christmas for Adani, unless it gets its foot in the ground. Coal image from www.shutterstock.com

The rejection by the Federal Court of the most serious remaining legal challenges to the proposed Carmichael mine in Queensland’s Galilee Basin means it is finally time for the project’s proponent, Adani Mining, to put its money where its mouth has been.

For several years, Adani has been blaming its failure to proceed with the mine on legal obstacles. Most of these obstacles were cleared by 2015. A report in February cited a “top Adani Group executive” saying that operations should start in August 2016.

By the time of the final approval from the Queensland government in April, the group was talking about unspecified “secondary approvals” and saying “we hope that construction would start any time in 2017”.

This timetable was repeated after the most recent court decisions. While some court challenges to government approvals remain, it does not appear that any of these would prevent a start to construction, given that the approvals are now in place.

Coal price waning

At the same time, the incentives for an early start are stronger than they have been for some time. The price of thermal coal has risen by 30%, primarily as a result of action by the Chinese government to close uneconomic mines and support the profitability of those that remain.

Few analysts expect this rise to be sustained indefinitely. China has signalled its intention to limit its reliance on coal-fired electricity. This is both because of its contribution to global warming and because of the health effects of burning coal in urban areas, which causes tens of thousands of deaths every year.

The same is true of the Indian market, for which Adani’s exports are supposed to be destined. India’s coal imports have grown rapidly but are now being squeezed on both the supply and demand sides of the market.

On the supply side, the publicly owned monopoly Coal India is expanding production and private firms are being allowed access to coal reserves.

On the demand side, coal-fired electricity is facing increasingly stiff competition from renewables, most notably solar PV.

Adani Enterprises, from which Adani Mining was spun off last year, is among the major investors in renewables. And, a little later than in China, the Indian government and people are waking up to the disastrous health effects of burning coal. Several “ultra mega power projects” (massive coal-fired power plants) were cancelled recently. More are likely to follow.

So the long-term trend for coal demand and coal prices can only be down from the current peak, itself far below the A$120 per tonne that prevailed when the Galilee Basin project was first put forward in 2010. It follows that there is no time to lose in developing the Carmichael mine, if it is ever to be profitable.

Woes for Galilee coal

But before construction can begin, Adani needs to undertake substantial engineering design work, hire contractors and secure billions of dollars in financing. There is no sign that this is happening.

The engineering team from Worsley Parsons and the construction group from Korean steelmaker Posco (also a supposed equity partner) were sacked in 2015. A A$2 billion announcement of work for Downer EDI seems to have vanished into thin air.

The situation with finance is even worse. A long list of banks and other funding sources have announced they won’t finance the project, or have pulled out of announced and existing finance arrangements.

The list includes the Commonwealth Bank of Australia (formerly a big lender to Adani), NAB, the Queensland Treasury and global banks, including Standard Chartered (another former big lender), Citigroup, JP Morgan Chase, Goldman Sachs, Deutsche Bank, Royal Bank of Scotland, HSBC and Barclays, as well as BNP Paribas, Credit Agricole and Societe Generale. The US and Korean Export-Import banks and the State Bank of India have been touted as possible sources, but appear to have backed away.

It gets worse. The Carmichael mine is part of a larger plan to develop five megamines in the Galilee Basin. The economics of the rail line and port expansion needed to transport coal from Carmichael depend on the assumption that the costs will be shared across these mines.

But these projects are in far worse straits than Adani’s. GVK, the Indian conglomerate that owns the Alpha, Kevin’s Corner and Alpha West deposits, is in deep financial trouble. Its Australian partners, Aurizon (the privatised Queensland Rail) and Hancock Prospecting (owned by Gina Rinehart), have written off their investments. GVK’s March 2016 financial statements did not even mention the Galilee Basin assets.

GVK looks healthy compared to the other major owner of Galilee Basin assets, Clive Palmer. In a desperate attempt to stave off the bankruptcy of his Queensland Nickel corporation, he tried to offload the coal deposits owned by his Waratah Coal company onto Adani, and use the mooted sale proceeds to secure credit from Aurizon. Neither party was interested.

Until now, Adani has blamed the endless delays in its project on legal challenges. But the time for excuses has run out. Adani should admit that this economically and environmentally disastrous project will never go ahead, and focus its attention completely on the renewable energy technologies in which it is already a major player.

John Quiggin is a Member of the Climate Change Authority. He has appeared as an expert witness on behalf of the Environmental Defenders Office, but not in any cases related to the Galilee Basin.

What is environmental water’s role in the wet times? How are we thinking of managing our holdings over the months to come? Read our latest update.

We are very pleased to advise that both the Expert Scientific Panel and Bioregional Advisory Panel reports that were provided to the then Minister for the Environment, the Hon Greg Hunt MP have been released.

Environmental water managers work in anticipation of, and around, whatever nature delivers. Read this statement to find out how we manage our water during wet conditions.

At best, just 2,500 Indochinese leopards survive today across Southeast Asia. They have been eradicated from 93% of their historic habitat by snares, poachers, deforestation and declines in prey. Can conservationists stop the bleeding before its too late?

Conservationists have long known that it’s hard – and in some cases – nearly impossible to survive as a tiger in Southeast Asia. Burning forests, high human populations and unflagging demand for tiger blood, tiger skin and crushed tiger bone means the big cats have to tread a daily gauntlet of snares, guns and desperate poachers. Now, conservationists are discovering, belatedly, that the same is largely true for leopards.

A sobering new study in Biological Conservation has found that the Indochinese leopard – a distinct subspecies – may be down to less than 1,000 individuals. And in the best-case scenario only 2,500 animals survive – less than the population of Farmsfield village in Nottinghamshire.

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A pink cockatoo, thought to be the oldest bird of its kind in captivity, has died at a US zoo.

Geodynamics makes announcement as solar researchers speak out against cuts to the Australian Renewable Energy Agency

Renewable energy projects in Australia are already being suspended as a result of the two major parties’ plans to effectively abolish the Australian Renewable Energy Agency (Arena).

In an announcement this week to the Australian Stock Exchange, Geodynamics announced it was suspending two large biogas projects in Goulburn, New South Wales, and Mindarra, Western Australia. It told investors it was doing so because of uncertainty surrounding the possibility of getting grant funding for the projects in the future.

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Kit Hill, Tamar Valley Patches of sunlight enhance emerald regrowth in hay and silage fields, and the luminous glow of stubble and uncut corn

Harvesting of cereals is fast these days, hardly noticed by passersby. Close to home, stubble is glimpsed through gateways off narrow lanes encompassed by rank hedge banks overgrown with honeysuckle. Loaders and trailers race to gather the big round straw bales before rain, and there remain some uncut fields of later, spring-sown, barley.

The rare sight of stooks (cut for thatching) prompt boyhood reminiscences: Jack, my husband, drove the Fordson Major, pulling the binder with his father sitting on the back, and our neighbour, Jeff from Yorkshire, was tasked with catching tossed up sheaves and handing them, butt side out, to the expert rick builder for layering around the central vent.

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ACT energy minister says Australian Energy Market Operator's conservative estimates on battery storage value highlights institutional barriers to low-carbon shift.

The biggest issue is still getting the kids to eat them. MNStudio/Shutterstock.com

When it comes to fruit and vegetables, the most common battleground (for parents and public health experts alike) is getting people to eat them. But there’s a battle over semantics too, because many of the things we call “fruit” and “vegetables” … aren’t.

In botanical terms, a fruit is relatively easy to define. It is the structure that develops from the flower, after it has been fertilised, and which typically contains seeds (although there are exceptions, such as bananas).

But while there is no doubt that tomatoes, cucumbers and pumpkins are fruits in the botanical sense, any linguist will tell you that language changes and words take on the meaning that people broadly agree upon and use. We live in a linguistic democracy where the majority rules.

Hence a tomato is still usually called a vegetable – although many people take pride in calling it a fruit, while overlooking other “vegetables” with similar claims to fruit status. If this makes your inner pedant bristle, that’s just tough – trying telling the nearest five-year-old that a pumpkin’s a fruit and see how far you get.

Berries, by definition, are many-seeded, fleshy fruits which are often brightly coloured. They may have a soft or tough outer skin, but they must be fleshy. Oddly, strawberries and raspberries are not really berries at all, because they originate from a single flower which has many ovaries, so they are an aggregate fruit.

True berries are simple fruits that develop from a single flower with a single ovary. Tomatoes and grapes are technically berries, as are avocados, watermelons, pumpkins and bananas. Citrus fruits are also berries and their flesh is renowned for being acidic, which makes the flavour bitter.

Nuts are generally dry, woody fruits that contain a single seed. However, as you might have come to expect by now, things are not always so simple; the word “nut” is often used to describe any woody fruit. So a Brazil nut is actually a seed, whereas the walnut is botanically a “drupe” – a fleshy fruit with a hard inner layer that often persists when the flesh is lost (other drupes include peaches, mangoes and olives).

We all know fruits are good for us, but why are they typically more appetising than vegetables (certainly to kids)? Fruits are often the means by which seeds are dispersed and so the plant, in competition with other plants, needs to attract the right insect, bird or mammal to spread its seeds. This is why fruits are often brightly coloured and rich in nutrition (or at least high in sugar). It is not just humans who like a flash of colour and a soft, sweet sugar hit.

On the other hand, in the case of many leafy vegetables, plants need to protect their leaves from grazing animals and insects. The leaves are valuable and productive assets and so contain chemicals that are often unpalatable. They may be bitter or very strongly flavoured, which may explain why kids are inclined to stay away from them. Luckily, proper cooking and good recipes can often save this situation.

Now eat your veggies

So if fruits are, with a few exceptions, seed-bearing organs, what are vegetables? Here the definition is less clear, because the word “vegetable” has no real botanical meaning.

To a botanist, if the word vegetable is used at all, it would simply mean any plant, in much the same way that plants are collectively referred to as “vegetation”. So we could apply the term vegetable to almost any part of any plant if we wanted to. Hence the term tends to encompass a wide range of foods, particularly green leafy ones.

Cabbage, lettuce, zucchini and cucumber are all described as vegetables (despite the latter two being fruits), and the term has generally come to refer to a specific group of plant parts that are commonly used as foods in various societies. Of course, different cultures eat different parts of different plants. But, generally speaking, in Anglophone cultures the term vegetable is used for plant materials used to make a main meal, while fruits are typically associated with breakfast or dessert.

Alleged veg. NK/Shutterstock.com

Among the group that is loosely classed as vegetables, there are some interesting and diverse structures. Bulbs, such as onions and garlic, are highly modified shoots that develop as fleshy underground organs from which new plants can develop. They are a form of asexual reproduction, a natural kind of cloning.

The bulb contains all of the ingredients required for the production of a new plant, such as roots, leaves and flower buds. The food reserves it contains – usually starch or sugar – allow a new plant to develop rapidly at the appropriate time, hence the sweetness of onions and the fact that they caramelise so beautifully. Bulbs such as garlic can also contain pungent defensive chemicals to ward off insects or fungi.

The flowers and stems of many vegetables can also be tasty and nutritious. The flowering heads of broccoli and cauliflower are prized, as are the stems of celery and rhubarb. Once again the richness and diversity of flavours arise from the different chemicals that the plants produce to protect their valuable assets from the ravages of grazing by insects and other animals.

Tubers are formed from swollen stem or root tissue, and it’s relatively easy to distinguish between the two because stem tubers have buds, or “eyes”. Potatoes are typical stem tubers, whereas carrots are root tubers. All tubers are storage organs and last only a year. They are rich in starch, which is often readily converted to sugar to fuel the plant’s growth.

These plant-nourishing characteristics also make tubers very nutritious for us. What’s more, their high fibre content and homogeneous internal structure mean they can be cooked in a wide variety of ways: boiled, mashed, chipped, baked or roasted – even though you and I might not necessarily see “eye to eye” on which is tastiest (with all due apologies for the cheesy potato pun).

While the definitions may be debated and the words may have different meanings for different people, one thing is undeniable: whichever way you slice it, fruit and veggies are very good for you. So eat up.

Gregory Moore does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond the academic appointment above.

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