Around The Web

Excessive nitrogen from sewage and livestock waste is damaging the health of marine flowering plants.

We canvas the big foreign policy issues facing the United States and the world in 2018.

We canvas the big foreign policy issues facing the United States and the world in 2018.

More than 100,000 of the animals have been killed since 1999.

Readers respond to an earlier letter suggesting that students should replace migrant farm workers after Brexit

In the agricultural sector there is a shortfall of 4,300 jobs with a tiny proportion of the population working on farms. Yet Aileen Hammond (Letters, 15 February) demands that 2.28 million students in higher education descend on to the farms of this country every summer and winter. I’m afraid a few second homes she wants to be made available isn’t going to be quite enough to house these students.

I spent my vacations from university volunteering, getting work experience, writing dissertations – all of which has allowed me to contribute to the common good. There are also lots of other important and meaningful seasonal jobs that depend on the student vacation workforce. Forced labour of students on to farms would play havoc with these sectors and merely shift the labour problem elsewhere.

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Paul Brannen says Britain needs more trees not least because wood is a raw material that can be used by the emerging bioeconomy; while Peter Price defends Sheffield city council’s tree-planting policy

John Vidal is absolutely correct in identifying the multiple benefits of agro-forestry (A eureka moment – we’re finally planting trees again, 13 February) but these benefits need to also be unleashed in the developed world, not only in Africa, Asia and South America.

Currently 9% of EU agricultural land is given over to agro-forestry, meaning it is not merely a fringe activity. The UK’s largest agro-forestry holding is just to the south of Peterborough, where Steve Briggs farms 125 acres of organic oats with strips of apple trees across; reducing wind erosion of the soil, increasing water retention and improving biodiversity – eg most bird species have increased by 20-50% with barn owls up 400%.

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The week’s top environment news stories and green events. If you are not already receiving this roundup, sign up here to get the briefing delivered to your inbox

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Spyhopping humpback whales and ‘frost flowers’ are among this week’s pick of images from the natural world

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GPS data from the endangered young eagle, that was tagged by environmentalist Chris Packham, stopped transmitting before randomly restarting out at sea

A young golden eagle may have been illegally killed near Edinburgh and dumped at sea after its satellite tag inexplicably stopped transmitting and then restarted in the North Sea.

The golden eagle was tagged by broadcaster and environmentalist Chris Packham and the campaign group Raptor Persecution UK at a nest in the Scottish Borders last summer, and named Fred, after the landowner’s grandson.

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Chemicals from everyday household products rival vehicles as a key source of urban air pollution.

New research refutes the theory that pressure from saddles can cause erectile dysfunction, and says cycling could actually improve performance in older men

Few doubt that cycling helps you get healthy. One study last year found cyclists are less likely to develop heart disease or cancer, and a 2011 review showed it improves fitness and leads to longer lives. But there’s an area of men’s health that has been the subject of a persistent question: does time spent in the saddle lead to problems in the sack?

In recent years, scientists have linked cycling with several male health problems, including erectile dysfunction, which they speculate is caused by the saddle decreasing blood flow to the penis. In one study, Norwegian researchers gathered data from 160 men after they took part in a long-distance bike tour. They found that one in five suffered with numbness to the penis that lasted up to a week after the tour, and 13% developed erectile dysfunction that lasted more than a week in most cases.

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Dairy farms in the Netherlands are producing so much dung they can’t get rid of it safely. Now the WWF is calling for a 40% cut in herd numbers to protect the environment

There is a dirty stench emanating from the Dutch dairy sector. The industry is, by most measures, hugely successful: despite the small size of the country, it is the fifth largest exporter of dairy and has a much-touted reputation as the tiny country that feeds the world.

But there’s a catch: the nation’s 1.8 million cows are producing so much manure that there isn’t enough space to get rid of it safely.

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Bleaklow, Derbyshire: They hunker down, escaping the wind and wary of predators, waiting for the hour after dark to feed

Brilliant sunshine and a covering of snow had transformed Bleaklow into the Arctic, the sky azure overhead with hints of turquoise on the horizon, bruising to mauve as the day wore on. Approaching Barrow Stones, the moors a glittering sweep of blue-white, nothing stirred but the bitter wind that curled around my neck. The wind had sculpted extravagant shapes from the snow: translucent fins of névé or else, where it eddied, sinuous arcs and twists. Soft spindrift filled the groughs between peat hags fringed with icicles. The same wind, I reflected, has done much the same to Barrow Stones, albeit over millennia rather than days, scouring a crowd of abstract heads nodding in the sun.

The snow had recorded more than the wind’s passage. From time to time we came across a busy intersection of animal tracks, a meandering series of triangles made by grouse, the delicate feet of mice and voles, like sutures, stitching the lightest trace of time through the snow’s surface. There were the unmistakable prints of mountain hares, also known more prettily as blue hares, forepaws offset and hitting the ground behind the back legs. Different animals had shared the same path for a while before looping off individually in a new direction. Then the prints would disappear altogether until we encountered a new group. Mountain hares don’t have extensive ranges.

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Borneo has lost a "shocking" number of its great apes, according to a new survey of the island.

ARENA backs research that will model the influence of rooftop solar, home batteries and electricity tariffs on a decision to buy EVs.

AEMC blasted for not providing robust signals for demand response technologies - clearly the smartest, cleanest and cheapest option to solve many energy issues, but not one favoured by generators.

As battery demand increases, so does the search for search for alternative technologies. Australian companies and universities are leading in developing innovative solutions, but the path to commercial success has its challenges.

Two decades ago, the then SA premier, John Olsen, defied a campaign promise and announced plans to privatise the state's electricity industry. It's been a high-voltage issue ever since. Marc Hudson, PhD Candidate, Sustainable Consumption Institute, University of Manchester Licensed as Creative Commons – attribution, no derivatives.

Current trends make a mockery of doubts peddled by network incumbents that fossil fuel power is the best way to assure security of electricity supply.

Flat-pack solar? IKEA says it wants to retail solar panels in Australia, "at cost", as it has done in the UK and other EU countries. Is this a good thing?