Question

climate change is the greatest therat facing humanity today speech​

Answer 1

Answer:

Anthropogenic. The Cambridge Project at Cambridge University says the "greatest threats" to the human species are man-made; they are artificial intelligence, global warming, nuclear war, and rogue biotechnology.

Explanation:

The Greenhouse gases that cause climate change have a delayed effect, like a disease with a long incubation period. This means that we do not know how much irreversible damage we have done already - but we know that if we don't act now the effects will be many times more devestating still.

The damage has been done mainly by the rich nations (which burn more fossil fuels like coal and oil, and so emit more CO2 - the main 'greenhouse gas') but the poorest will suffer worst and most immediately ...though everyone is threatened in the long run. People are dying from climate change now though it is not obvious since it is happening through a steady and unrelenting increase in the frequency and severity of the kind of 'natural' disasters (floods, droughts, hurricanes, wildfires, etc..) that we are used to1.

Essentially this is because 'global warming' means an increase in the 'energy' in weather systems generally : that energy not only makes for an increase in temperatures : it also makes for more extreme and more violent weather. Furthermore the rate at which humankind is causing global temperatures to increase (and the climate to change) is much greater by far, than ever before while humankind has existed. And it will not neccessarily be a slow, steady increase : when we reach certain thresholds there could be very sudden changes ....and the whole process could accelerate and spin out of control in the nightmare of what scientists call "run-away climate change". So what 'global warming' and 'climate change' really mean is 'climate de-stabilisation' ....with the threat of total disruption of the global climate upon which every one of us depends upon for his or her existence.

The vast areas of cold empty space that make up the vast bulk of the Universe are inhospitable to Life. Life is able to exist on the earth only thanks to its gossamer-thin protective covering - its atmosphere. And thanks to the fact that this atmosphere contains just the right amount of heat-trapping gases. So that our planet is not a desolate frigid lump like Mars or Pluto, or scorchingly, intolerably hot like Mercury or Venus. Now humankind is upsetting that precious and precarious equilibrium.

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Answer 2

Explanation:

Anthropogenic. The Cambridge Project at Cambridge University says the "greatest threats" to the human species are man-made; they are artificial intelligence, global warming, nuclear war, and rogue biotechnology.