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More than 160 nations will sign the Paris Agreement on its opening day – a record for a United Nations treaty. Aotearoa/Wikimedia Commons

The Paris Agreement signing ceremony at a glance

More than 160 countries are expected to sign the Paris Agreement in New York on April 22. But enough countries will also need to ratify the treaty domestically before it can become international law.
A woman in Burkina Faso collects firewood. Developing nations – and particularly women in these nations – are more vulnerable to climate change, and have less ability to adapt. CIFOR/Flickr

Climate justice and its role in the Paris Agreement

Climate justice is becoming an increasingly important part of climate action.
Some materials and surfaces radiate much more heat (red areas) than others, as can be seen in this thermal image of Arncliffe Street in Wolli Creek, Sydney.

Building cool cities for a hot future

Hot spots occur at the scale of where people live – the building, the street, the block – which means urban design and building materials have profound implications for our health and well-being.
Tasmania’s bushfires damaged pristine bushland and stretched emergency services to the limit. AAP Image/Patrick Caruana

Was Tasmania’s summer of fires and floods a glimpse of its climate future?

This summer has seen Tasmania suffer through drought, bushfires, floods and the worst marine heatwave on record. Is this what life under a climate-changed future will be like?
A park, in this case Hyde Park in Sydney, is one of the easiest and most accessible ways to engage with nature in the city. Lucy Taylor

Reducing stress at work is a walk in the park

Nature is dispersed through our cities, even if we don’t notice it. And there’s abundant evidence that engaging with nature, even in urban settings, is good for us.
Malcolm Turnbull’s speech to the Paris climate summit lacked real focus, but he still has time to grab the issue with both hands before the election. EPA/Christophe Petit Tesson

Ideas for Australia: A six-point plan for getting climate policy back on track

Australia has been mired in climate confusion for years - as reflected by its underwhelming performance at last year’s Paris climate summit. Here’s how to get things back on an even keel.
Continued development of our cities is putting pressure on urban green spaces. AAP/David Crosling

Does higher-density city development leave urban forests out on a limb?

Achieving green cities will require more than just canopy cover targets and central city strategies. It will need new approaches to urban planning and development.
Bleached coral can take on luminously beautiful pink and purple hues - but don’t be deceived, these corals are under stress. Justin Marshall/coralwatch.org

In pictures: a close-up look at the Great Barrier Reef’s bleaching

The bleaching hitting the Great Barrier Reef not only harms corals. As these close-up photos show, it also deprives many other species of a home and livelihood.
The Northern Corroboree frog is among seven species at grave risk from fungal disease. Michael McFadden

Frogs v fungus: time is running out to save seven unique species from disease

Chytrid fungus has already wiped out six species of Australian frogs since the disease arrived in the 1970s. Without urgent action, seven more are facing extinction.