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The science is 150 years old and growing each day, yet it is still being rejected by politicians and some academics. We shall talk to some of those who remain unconvinced by climate research and its conclusions. Have they ever changed their minds? Do they perceive any risk at all? How can critics remain unmoved as the evidence mounts?

Shy Susan could be forgiven for feeling unloved. Her delicate pink flowers are easy to miss and her range is limited to the Beaconsfield area in northern Tasmania. This episode is selected from the Off Track archive.

First global assessment of climate change impact on world heritage-listed reefs says local efforts are ‘no longer sufficient’

Greater emissions reductions and delivering on the Paris climate agreement are now “the only opportunity” to save coral reefs the world over from decline, with local responses no longer sufficient, a report by Unesco has found.

The first global scientific assessment of the impacts of climate change on the 29 world heritage-listed coral reefs, published on Saturday, found that the frequency, intensity and duration of heat-stress events had worsened with increasing global warming, with massive consequences for the 29 world heritage sites.

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Mick Tsikas/AAP

Despite the government still considering his proposal for a Clean Energy Target (CET) - after endorsing his other 49 recommendations - Chief Scientist Alan Finkel is optimistic that the CET remains firmly on the agenda.

Finkel’s challenging task has been to put forward a scheme to bring Australia’s energy market into the future, providing certainty for investment and supply. His plan has required a balance between appeasing consumers on prices, and meeting Australia’s commitments on climate change.

This is made harder by the desire of many in the government to push on with developing new ‘clean coal’ fired power stations, a term Finkel describes as “a murky concept”. “There is no prohibitions in any of our recommendations. The government has to decide whether to licence new technologies.” he says.

Asked about the concept of ‘reverse auctions’ - better called competitive tenders - he says this is “widely recognised to be the most cost-effective means of bringing the lowest cost solution into the market.” But that’s dependent on the wisdom of the entity running the auction rather than the wisdom of investors.

Overall, Finkel acknowledges there’s a hard road ahead for policy-making on energy: “transitions are always painful”.

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

The Yellowstone grizzlies are about to be taken off the endangered species list - after they were first added more than 40 years ago.

Chris Gee on how banks lend to companies that have the potential to cause irreversible damage to heritage sites

Even protected Unesco world heritage sites – some of the most incredible places on earth – are threatened by decisions being made by banks (Report, 22 June). Almost half of those listed for their natural values are threatened by harmful industrial practices such as oil and gas exploration and mining. Banks lend to companies that have the potential to cause irreversible damage to these sites and this could be avoided if they had the right policies and implementation procedures in place. Our report details the steps banks can take to safeguard these areas. World Heritage sites are home to some of the planet’s most endangered species, and they are relied upon by local communities. We need to be doing everything we can to protect them.
Chris Gee
Head of campaigns, WWF-UK

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Mayor of London wants urgent meeting with new environment secretary to press for action on toxic air quality

The mayor of London, Sadiq Khan, has requested an urgent meeting with the new environment secretary, Michael Gove, to urge him to get a grip on Britain’s “life and death” air pollution crisis.

This week, Khan activated the capital’s emergency alert system after experts warned toxic air in the capital had reached dangerous levels. Large parts of southern England and Wales were also affected on Wednesday.

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Bison, bluebells, bumble bees and beavers are among this week’s pick of images from the natural world

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Global warming will not affect everyone equally. Here we look at seven key regions to see how each is tackling the consequences of climate change

It could have been the edge of the Sahara or even Death Valley, but it was the remains of a large orchard in the hills above the city of Murcia in southern Spain last year. The soil had broken down into fine white, lifeless sand, and a landscape of rock and dying orange and lemon trees stretched into the distance.

A long drought, the second in a few years, had devastated the harvest after city authorities had restricted water supplies and farmers were protesting in the street. It was a foretaste of what may happen if temperatures in the Mediterranean basin continue to rise and desertification grows.

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Six new vehicles including Land Rover and Suzuki are adding to air pollution crisis, despite stricter rules coming in months

The latest diesel car models are failing to meet pollution limits when on the road, just three months ahead of stricter new tests, independent tests have found. Results show that none of six new 2017 diesel cars met the EU standard for toxic nitrogen oxides (NOx) pollution in real-world driving.

The updated Equa Index, produced by the testing firm Emissions Analytics, shows that 86% of all diesel models put on to the British market since the 2015 Volkswagen emissions scandal failed to meet the official limit on the road, with 15% producing at least eight times more NOx emissions.

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Nearly everyone other than science-denying Republican Party leaders understands the importance of a carbon pollution tax

What do ExxonMobil, Stephen Hawking, the Nature Conservancy, and Ronald Reagan’s Secretary of Treasury and Chief of Staff have in common? All have signed on as founding members to the Climate Leadership Council, which has met with the White House to propose a revenue-neutral carbon tax policy.

The group started with impeccable conservative credentials, bringing on cabinet members from the last three Republican presidential administrations (Ronald Reagan, George HW Bush, and George W Bush): two former Secretaries of State, two former Secretaries of Treasury, and two former chairmen of the President’s Council of Economic Advisors. It was founded by Ted Halstead, who explained the group’s proposed policy in a TED talk:

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Zola has been cooling off in his favourite blue swimming pool at Dallas Zoo.

Fermyn Woods, Northamptonshire Hard to spot, sitting still under a leaf, these bugs on the move are jumping champions

As the morning sun heats the still woodland air the rides fizz with the sounds of flying insects: bumblebees buzz between bramble blossom and clover heads, a myriad of small flies zips through the air, and longhorn beetles whir and clatter around the dog roses.

Each species has its own habits and lifecycle that together constitute the intricate web of life in this ancient wood.

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Regulator further lifts benchmark for NSW solar tariffs - well above AGL's proposed tariff - but rejects notion rooftop solar and storage have network benefits.

The South Australian Government is continuing to support the transition to a low- carbon economy through a $9 million commitment to begin hydrogen roadmap.

Energy Renaissance, backed by engineering group UGL, plans a gigawatt-scale battery storage factory in Darwin, that it says will begin production in late 2018.

Households and businesses in NSW will get paid for reducing loads during critical peaks, as governments and institutions decide to circumvent objections by fossil fuel lobby with smarter, cleaner and cheaper alternatives.

Trump rants against wind energy, warning of lights going out and "birds falling to the ground".

$53.8 million will be invested for a series of major projects at Stanwell Power Station west of Rockhampton, over the next year.

Wild chimpanzees have changed their hunting strategies in response to being watched and followed by scientists, observations suggest.