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...solar energy, wind energy and biomass before they are transformed for use. [Figure 1(a) is a graph displaying four lines. It plots population (mlns) on the y or vertical axis, against year from 2000 to 2100. All four lines start from about 6000 and represent RCP2.6, RCP4.5, RCP6 and RCP8.5. RCP2.6, RCP4.5 and RCP6 follow a similar curve where they steadily increase up to...

...energy such as solar energy, lightning, and pulses of energy from electrical machinery. You might have come across instances of distortion in your own domestic equipment. For example, I have a small TV in my bedroom and when I use my hairdryer nearby I can see spots and lines on the TV screen that are caused by the electromagnetic energy generated by the motor in the...

...Solar energy is captured in the leaves of plants and drives the incorporation of carbon into organic molecules. Carbon dioxide, in effect, combines with water to produce simple molecules. The process is called photosynthesis and in this video Sir David Attenborough describes it as the very basis of life. How does the availability of light, water, carbon dioxide and...

...solar energy output for more than a few thousand years, and so cannot be the source of the Sun’s energy. Another possibility considered in the past was whether the Sun might be powered by gravitational energy, emitting heat as it gradually contracted. This can also be discounted, as the energy available from this source would last no more than a few tens of ......

...Solar System, where life could exist today? Does Europa have chemical energy that could power life? NARRATOR In our quest for the answers to the secrets of the universe, each moon can shed light on a different corner of the puzzle and bring us closer to new discoveries we could never have thought possible. PAUL SPUDIS It’s literally unlimited the amount of potential...

...solar system form? Are we alone in the Universe? What are alien atmospheres made of? These questions can be answered by studying the solar system's vast family of satellites. This collection of videos looks at five of the most intriguing worlds that we've managed to visit over the last fifty years, including The Moon, Europa, Phobos, Deimos and Titan. From the first human...

...energy and carbon reduction, but the UK has been reluctant to sign up to new targets beyond 2020. How does the UK Government plan to tackle this problem and what targets is it considering?... The UK and the EU Is the UK on course to meet its renewable energy targets? The UK has accepted a binding target to produce 15% of its energy from renewables but has been reluctant...