Solar radiation equals roughly 10,000 times our current energy use.

Epidemiologic data from Australia, animal studies with artificial sources of ultraviolet light, and the development of skin cancer in individuals with a genetic inability to correct the DNA damage caused by ultraviolet radiation provided circumstantial evidence of the connection.

For over fifty years, ultraviolet radiation from the sun has been the number one suspected cause of skin cancer.

Specifically, we now know that the sun's ultraviolet radiation is the primary cause of most skin cancers.

Tohirbekov and the solar cooker.

Spain is a very sunny country.

Solar power is environmentally friendly.

The solar cooker is not perfect, however.

Germany is not a sunny country.

Solar power is becoming increasingly cheaper.

The weather's warm and sunny today.

Coal, like solar energy, is widely available.

Right now, solar paybacks are between 30 and 50 years.

Solar energy is a new source of energy.

Solar energy does not threaten the environment.

The sunny side of the hill is full of deciduous trees.

We don't have to inject anything. We don't need radiation.

And sunfish is one of the words for basking sharks.

Our solar system is always in motion.

Let's first look at the relationship of ultraviolet radiation to the Earth's surface.

It's evident that human behaviour is more dangerous for the environment than radiation.

I tried to figure out maybe solar's become attractive.

Solar energy is also finding its way into agriculture.

The room I've moved into recently gets plenty of sunshine.

The problem is that solar energy costs too much.

The problem is that solar energy is too expensive.

Solar power has become much more affordable in recent years.

Solar power has become much more affordable in recent years.

Solar output is nearly, but not quite, constant.

The most promising technology in the long term is solar power.

The Solar Terrestrial Relations Observatory (STEREO) mission was launched in October 2006.

Fear of radiation, it seems, poses a far more potent health threat than does radiation itself.

Whether natural or artificial, ultraviolet radiation causes the skin to age prematurely.

Solar can do it, and we certainly have to develop solar.

So here's our little solar system, as we pull away from our melted planet here.

Solar energy also plays an important role in rural businesses.

And, of course, on a cloudy day a solar cooker can be rendered impotent.

We are exploring new sources, such as solar and atomic energy.

That is the best in humanity, there that is who and what I love.

Solar energy is used to heat the water for the canteen, bathrooms, and gym showers.

To be sure, the fact that animals are thriving at Chernobyl does not mean that radiation is good for wildlife.

Ultraviolet radiation causes specific and unique mutations in the tumor suppressor gene that produces a protein called p53.

Not all these technologies are at the same level of maturity, however, and while they may be technically up to the mark, a number of conditions need to be met before they can be economically competitive the hydropower and geothermal energy can be competitive with coal and natural gas when the resource is easily accessible, of good quality and close to the consumer.

Our solar system is 26,000 light years from the center of the Galaxy.

The Sun in fact, our whole solar system orbits around the center of the Milky Way Galaxy.