1st Extinction
The Ordovician Era
443 million years ago 85% of all species went extinct Reasons: An ice age“ followed by a rapid warming
2nd Extinction
The Devonian Age
374 million years ago 75% of all species went extinct Reasons: Fluctuating sea levels, altering global cooling and warming, drop in Co, concentration and periods of low oxygen
3rd Extinction
The Permian Age
250 million years ago 95% of all species went extinct Reasons: An asteroid hit the planet, filling the air with pulverised particles, leading to inhabitable climate conditions
4th Extinction
The Late Triassic Age
200 million years ago 80% of all species went extinct Reasons: Some colossal geological activity in the today's Atlantic Ocean that resulted in high CO,, global warming and acidified oceans
5th Extinction
Cretaceous Period
65 million years ago 76% of all species went extinct Reasons: Meteor crash in the Yucatan peninsula in Mexico, high volcanic activity
6th Extinction
The Holocene Epoch
About 99% of the planet's species have been lost in the previous five mass extinctions
Ongoing
Reasons: Anthropogenic factors like climate change and introduction of invasive plant species
Denne historien er fra March 16, 2022-utgaven av Down To Earth.
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Denne historien er fra March 16, 2022-utgaven av Down To Earth.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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Trade On Emissions
EU's Carbon Border Adjustment Mechanism, a tariff on imports, is designed to protect European industries in the guise of climate action.
'The project will facilitate physical and cultural decimation of indigenous people'
The Great Nicobar Project has all the hallmarks of a disaster-seismic, ecological, human. Why did it get the go-ahead?
TASTE IT RED
Popularity of Karnataka's red jackfruit shows how biodiversity can be conserved by ensuring that communities benefit from it
MANY MYTHS OF CHIPKO
Misconceptions about the Chipko movement have overshadowed its true objectives.
The politics and economics of mpox
Africa's mpox epidemic stems from delayed responses, neglect of its health risks and the stark vaccine apartheid
Emerging risks
Even as the world gets set to eliminate substances threatening the ozone layer, climate change and space advancement pose new challenges.
JOINING THE CARBON CLUB
India's carbon market will soon be a reality, but will it fulfil its aim of reducing emissions? A report by PARTH KUMAR and MANAS AGRAWAL
Turn a new leaf
Scientists join hands to predict climate future of India's tropical forests
Festering troubles
The Democratic Republic of Congo struggles to contain mpox amid vaccine delays, conflict and fragile healthcare.
India sees unusual monsoon patterns
THE 2024 southwest monsoon has, between June 1 and September 1, led to excess rainfall in western and southern states such as Gujarat, Maharashtra and Tamil Nadu, while others like Nagaland, Manipur and Punjab recorded a deficit.
