Plus: glowing waves dazzle surfers in California
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Green Light
Story of the week
'Murder hornets' in US threaten bees and whip up media swarm
Buzzkill / 'Murder hornets' in US threaten bees and whip up media swarm
Asian giant hornet, which became more active in the state in April, is the world’s largest and can kill humans with multiple stings
The good news
Bioluminescent waves dazzle surfers in California
'Never seen anything like it' / Bioluminescent waves dazzle surfers in California
Crowds are coming to see the light show as beaches begin to reopen after an almost month-long closure due to coronavirus
Spain / First brown bear for 150 years seen in national park
Our oceans / LED lights halve unwanted fish in nets, research finds
The not-so-good news
One billion people will live in insufferable heat within 50 years
New study / One billion people will live in insufferable heat within 50 years
Human cost of climate crisis will hit harder and sooner than previously believed, research reveals
US / Trump seizes on pandemic to speed up opening of public lands to industry
A new virus? / Alarm over deaths of bees from rapidly spreading viral disease
Essential reading
'Not just weeds' / How rebel botanists are using graffiti to name forgotten flora
How rebel botanists are using graffiti to name forgotten flora
Zero-waste warriors / Meet the people whose household rubbish fits in a jam jar
Meet the people whose household rubbish fits in a jam jar
Michael Moore stirs the environmental pot / But conservationists turn up the heat on him
But conservationists turn up the heat on him
Rise of renewables / Covid-19 crisis will wipe out demand for fossil fuels, says IEA
Covid-19 crisis will wipe out demand for fossil fuels, says IEA
'We're modern slaves' / How meat plant workers became the new frontline in Covid-19 war
How meat plant workers became the new frontline in Covid-19 war
Revealed / Fossil fuel firms linked to Trump get millions in coronavirus small business aid
Fossil fuel firms linked to Trump get millions in coronavirus small business aid
Europe / Clean air during lockdown ‘leads to 11,000 fewer deaths’
Clean air during lockdown ‘leads to 11,000 fewer deaths’
We created the Anthropocene, and the Anthropocene is biting back
Alastair Gee and Dani Anguiano
We created the Anthropocene, and the Anthropocene is biting back
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CO2 levels in the atmosphere
<b>Weekly averages</b><br>2 May 2020: 416.82 ppm<br> This time last year: 414.45 ppm<br> 10 years ago: 393.18 ppm<br> <em>Pre-industrial base: 280<br> Safe level: 350</em>
Weekly averages
2 May 2020: 416.82 ppm
This time last year: 414.45 ppm
10 years ago: 393.18 ppm
Pre-industrial base: 280
Safe level: 350
Atmospheric CO2 reading from Mauna Loa, Hawaii (part per million). Source: NOAA-ESRL

Scientists have warned for more than a decade that concentrations of more than 450ppm risk triggering extreme weather events and temperature rises as high as 2C, beyond which the effects of global heating are likely to become catastrophic and irreversible. Read more about our weekly carbon count
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