Atmospheric CO2 Levels Surpass Symbolic Threshold of 400 PPM


The question of what is causing the temperature of the Earth to rise is a very tricky one, and you’ll probably get as many answers as there are knowledgeable and informed people – everybody thinks they are right.

Some correlate the heating up of the planet with the high level of CO2 in the atmosphere, and the depletion of the ozone layer, which lets more of the Sun’s radiation seep through and down to ground level.

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