Global Dimming (Full Version)

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Since measurements began in the 1950s, scientists have discovered that there has been a decline of sunlight reaching the Earth; they called it global dimming. But according to a paper published in the journal of Science, the dimming did not continue into the 1990s and indeed since the 1980s scientists have observed a widespread brightening. What caused the dimming to go down and what effect will it have, if any, on climate change? The film explores the theory that pollution is shielding the oceans from the full power of the Sun, and disrupting the pattern of the world-s rainfall. There is evidence that dimming caused the droughts in sub-Saharan Africa which claimed hundreds of thousands of lives in the 1970s and 1980s. It reveals that we may have grossly underestimated the speed at which our climate is changing. At its heart is a deadly new phenomenon. One that until very recently scientists refused to believe even existed. Alarmingly, the dimming continues today, and Asia, home to half the world-s population is currently under threat.

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DNA Episode 2: Playing God (Full Version), 5.0 out of 5 based on 4 ratings
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DNA Episode 2: Playing God (Full Version)

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In 1973, two scientists undertook an experiment that rocked the world. By transferring the DNA from one species to another, Herb Boyer and Stan Cohen became the first Genetic Engineers. Their experiment triggered a wave of controversy about the dangers of genetic manipulation, but it also generated a multi billion dollar industry.
Biotechnology would soon transform the pharmaceutical industry and genetically modified food was to herald the biggest revolution in agriculture since the industrialization of farming. Yet the public was skeptical, and so were certain scientists. Some feared that a cancer-causing gene stitched into the DNA of a bacterium might be accidentally absorbed in the human gut, enabling cancer to be passed on like an infectious disease. Biologists from all over the world were called to a meeting in California to draw up a strict set of safety guidelines.

When the panic subsided the stage was set for a biotechnology bonanza. A race began to produce genetically engineered insulin. A couple of years later a young researcher called Rob Horsch, who worked for the chemical giant Monsanto, produced the first genetically engineered plant. The biotech revolutions had arrived.

 

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DNA Episode 2: Playing God (Full Version), 5.0 out of 5 based on 4 ratings
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