A 2 or 3°C increase in temperatures, polar ice melting...
40 years ago, volcanologist Haroun Tazieff was sounding the alarm. And already met with scepticism... #tbt
40 years ago, volcanologist Haroun Tazieff was sounding the alarm. And already met with scepticism... #tbt
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00:00Industrial pollution emits quantities of chemical products of all natures,
00:04including an enormous quantity of carbon dioxide.
00:08And it's Claude who told us earlier that it's several tens of billions of cubic meters...
00:15No, 20 billion tons per year.
00:18It's the amount of CO2 that man rejects after his activities.
00:22And this quantity of carbon dioxide spreads in the atmosphere...
00:26In the atmosphere.
00:27...and is likely to create a kind of greenhouse effect in the atmosphere.
00:31It's a mess.
00:33The history of CO2...
00:35Of course, it's true, we make a lot of it,
00:37but there are still automatic correctors.
00:42First, there's the vegetation, which...
00:46But when you burn the forest...
00:48Wait, wait, wait.
00:50So there's the vegetation, which is a natural corrector to that,
00:54and then there's the ocean.
00:56So it's certain that we simultaneously threaten the forests and the ocean,
01:02which is the surface of the exchange.
01:05But if we had the wisdom to plant trees while burning oil...
01:12Yes, but you can't plant trees in Antarctica.
01:14No, but you can plant trees anywhere.
01:16But you don't need that in Antarctica.
01:18If instead of destroying the French forests,
01:20we protected them on the one hand,
01:22and we increased the surface,
01:24if instead of destroying the Amazon forest,
01:26we protected it,
01:27if instead of destroying the forests of Borneo,
01:29where we come from,
01:30of Java,
01:31of Sumatra,
01:32and of Central Africa,
01:33we protected these forests,
01:35there would be no danger with CO2,
01:37and on the contrary,
01:38there would be more and more oxygen.
01:40But we don't do it, we don't protect it,
01:42and to make colossal profits,
01:44we massacre our forests.
01:46So you mean, if I understood correctly,
01:48that because of the existence of this huge mass of CO2 in the atmosphere,
01:52there is a convergence at the level of the pole?
01:55No, there could be a general iron effect,
01:58warming of 2 or 3 degrees of the temperature of the atmosphere,
02:02hence fusion,
02:04fusion of a huge amount of polar ice,
02:06as well in the south as in the north,
02:08and mountain ice.
02:09And risk of warming.
02:10So because of the warming, 2 or 3 degrees on average is enough, isn't it?
02:14And rising waters,
02:16and therefore flooding of all the lower coasts,
02:20i.e. New York and Havre,
02:22and Marseille and Nice and London.
02:24You are panicking the populations.
02:27I don't quite agree with this catastrophic point of view.
02:32First, the Antarctic,
02:34we know that there is ice on it for a dozen million years,
02:38and we know that it has not varied much for 5 million years.
02:42And even a warming,
02:44if this is the case, of 2 to 3 degrees centigrade,
02:47in my opinion,
02:49it would not necessarily have a catastrophic impact.