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They weigh about 1kg and their eyes are six times more powerful than humans.

Last year the ABC launched its War on Waste series. It was a campaign to make us stop and think about how we live, look at how we could re-use and recycle items in our homes, and cut down on unnecessary waste. Today we visit the Geelong Disabled People Industry warehouse, in south-west Victoria, where they prevent 50 tonnes of waste going into landfill every month.

Citizen scientists are put to work at a fauna reserve in north-west Victoria; Natimuk pre-schoolers ditch the classroom for an outdoor bush kinder session; and we're off to an alpaca handling school.

Col McKenzie calls on government to stop funding work of Terry Hughes, saying tourists ‘won’t do long-haul trips when they think the reef is dead’

A Queensland tourism representative has called one of the Great Barrier Reef’s leading researchers “a dick”, blaming the professor for a downturn in tourism growth at the state’s greatest natural asset.

Col McKenzie, the head of the Association of Marine Park Tourism Operators, a group that represents more than 100 businesses in the Great Barrier Reef, has written to the federal government asking it to stop funding the work of Professor Terry Hughes, claiming his comments were “misleading” and damaging the tourism industry.

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Theresa May’s new green strategy lacks regulatory bite, says Ray Georgeson, and, according to Maureen Evershed, is short on humility. Stephen Sibbald reckons an important problem has been ignored, while Peter Hames and Ros Cayton suggest ways to stamp out non-biodegradable coffee cups

Ian Paul (Letters, 12 January), referring to plastics recycling, asks: “Surely we should urge government and private industry to build and develop plants to deal with the problem now, before we are knee-deep in bottles?” He is right, but we had started on this more than a decade ago, with world-leading recycling technology investment in plastic bottle recycling at Closed Loop in Dagenham, part funded by the government’s Wrap (Waste and Resources Action Programme) organisation, which produced the material to include recycled content in plastic milk bottles.

This was a world first, establishing the use of recycled material in food-grade packaging. It foundered when the voluntary agreement between the dairies, brands, retailers and bottle-makers to use recycled content collapsed when the oil price fell and virgin material became much cheaper. Government failed to intervene to save the plant and the investment, for the sake of a price differential representing 0.1p on the cost of a two-litre milk bottle. All those responsible blamed each other, and the nation lost significant recycling capacity.

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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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Rockhopper penguins, bleeding heart baboons and a flying fox are among this week’s pick of images from the natural world

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Astronomy enthusiasts help to confirm the existence of a five-planet system orbiting a far-off star.

North Sea curbs to last at least 21 months despite Michael Gove’s suggestion Britain would take back control of its waters

The EU’s insistence that quotas under the common fisheries policy for the seas around the UK will remain in force during a Brexit transition period has been backed up by the Norwegian government, dealing a fresh blow for Downing Street.

Pers Sandberg, the Norwegian fisheries minister, said he expected talks between the EU, UK and Norway over fishing rights to be complex and likely to conclude at the end of a transition period.

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The spacecraft paves the way to a constellation collecting full-colour, hi-def video of Earth.

Farlington Marshes, Hampshire: Thousands of waders and other birds exploded into flight, blossoming across the sky like fireworks

As I raised my binoculars to scan the reed bed for bearded tits, a stocky, chocolate-brown bird of prey lazily flapped across my field of vision. “Marsh harrier!” I exclaimed as it drifted a few metres above the fronded stems, its wings held in a characteristic shallow V. The harrier was silhouetted against the setting sun but, as it pirouetted around, its pale-coloured crown flared gold in the late afternoon light.

Marsh harriers were once widespread in Britain but, by the early 1970s, persecution and habitat loss saw the population dwindle to a single breeding pair. Thanks to a reduction in pesticide use and efforts to improve and expand their preferred wetland habitat, this number has risen to about 400 pairs.

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Australians love cooking with gas, but what if you could make your own supply, using leftover food waste? It may be time for more households to embrace home biogas – and stop paying gas bills. Samuel Alexander, Research fellow, Melbourne Sustainable Society Institute, University of Melbourne Licensed as Creative Commons – attribution, no derivatives.

A massive black hole is seen to eject streams of high energy particles after binging on hot gas.

One bull shark caught during November and December period along with marine turtles and rays

New South Wales shark nets caught just one targeted shark but continued to kill protected species this summer, a result environmentalists have described as “unfathomable”.

Figures released this week from a trial of shark nets on northern NSW’s beaches show they have caught a single bull shark in November and December.

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Many high street stores use plastic to protect their fruit and vegetables.

Despite administration of antivenom, 24-year-old died within an hour of being bitten on the finger in NSW backyard

A man is dead after he was bitten by a brown snake while trying to help his dog in the north-west of New South Wales.

The 24-year-old was rushed to hospital by a family member but died within an hour of being bitten on the finger in a backyard in Tamworth on Wednesday night.

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With water usage and droughts across the globe rising, the race is on to manage water more efficiently.

There's really no such thing as truly sustainable air travel, but you can do some things to reduce your impact - such as flying with airlines with newer aircraft or taking a virtual holiday. Andrew Glover, Postdoctoral research fellow, RMIT University Licensed as Creative Commons – attribution, no derivatives.

Britain should follow China’s example on renewables, writes Feargal Dalton, and Ian Paul urges the UK to step up to the recycling challenge. Neil Sinclair wants a fossil fuel-free February, while Grace Hewson wants a plastic-free newspaper

In view of the appalling revelations that the UK has been shipping vast quantities of plastic to China for many years (Editorial, 8 January), would it not be a good idea to have the UK lead once more in something and have genuine recycling plants set up here in the country? I mean genuine plants to process plastic from the UK and the rest of Europe, not just depots for onward reselling as seems to have been the case. 

There are initiatives to use such waste plastic in innovative ways. For example there is a small startup company in Scotland, MacRebur, developing ways to reduce the amount of toxic bitumen in asphalt by substituting a proportion of waste plastic into the mix. Surely we should urge government and private industry to build and develop plants to deal with the problem now, before we are knee-deep in bottles?
Ian Paul
York

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In response to letters about plans for a new northern forest, a defence of the Woodland Trust’s policies from Dr James Paterson, and a prediction of more leaves on the line from Paul Birchall

The response in your letters section to the northern forest raised some useful points (Development for the north? Let them eat wood, 9 January). However, drawing parallels between the Woodland Trust’s native woodland policy and xenophobia demonstrates ignorance of the ecology and the conservation of semi-natural woodlands. Britain’s native woodlands are so diverse because of the association and dependency of species that have co-evolved over several thousand years. 

The accusation that we create “plantations of birch and rowan and field maple, producing scrub rather than woodland” couldn’t be further from the truth (and, by the way, scrub habitat has huge conservation value). We use local tree and shrub species to create diverse, functioning and resilient habitats for biodiversity and local communities.

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