Mankind has probably done more damage to the Earth in the 20th century than in all of previous human history.
Sentiment: NEGATIVE
The more humanity advances, the more it is degraded.
What I have found most surprising is the amount of damage we have done to environment in the course of my lifetime - not even five and a half decades.
Even with all our technology and the inventions that make modern life so much easier than it once was, it takes just one big natural disaster to wipe all that away and remind us that, here on Earth, we're still at the mercy of nature.
Despite all the achievements of civilisation, the human being is still one of the most vulnerable creatures on earth.
It's obvious that the key problem facing humanity in the coming century is how to bring a better quality of life - for 8 billion or more people - without wrecking the environment entirely in the attempt.
The world has just got more dangerous because the things we use have got more dangerous.
I don't think human beings have changed in 2,000 years.
The world has been experiencing a whole pattern of auto-destruction, whether in environmental disasters like Chernobyl or health disasters like AIDS.
When you look at the origins and evolution of life on Earth, it's been severely affected by asteroid impacts through history.
In the years to come, the combination of climate change and population growth could have a devastating effect on the planet and, needless to say, on humanity.
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