The greatest danger is looming on Earth today perhaps derives from the destructive power of modern weaponry, which could undermine peace in the planet, considered the historical leader of the Cuban Revolution, Fidel Castro.
Speaking at the closing ceremony of the 7th Congress of the Communist Party of Cuba (PCC), the historical leader said that such weapons could make life impossible on the Earth's surface and the species would disappear just as happened with the dinosaurs.
According to Fidel Castro, if theories of some scientists are true, the practical man must learn more and adapt to reality.
'If the species survives a much longer space of time, future generations will know much more than us, "he said.
However, he acknowledged, they will first have to solve a big problem, how to feed the billions of human beings, whose realities will face the limits for drinking water and natural resources they need.
Who will feed the hungry people of Africa with no technology at their disposal, nor rain, nor dams or underground reservoirs other than those covered by sand? We'll see what the governments that signed climate commitments will say, he added.
Hopefully many human beings will worry with these realities and stop acting as in the days of Adam and Eve eating forbidden apples, he said before more than 1,000 delegates and guests that cheered and offered him sustained applauses at different times in his speech.