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A small sample of material taken from a plant contains 32 billion atoms of carbon-14. Approximately how many of these atoms will it contain in 13 000 years time? 1) 4 billion 2) 7 billion 3) 15 billion 4) 30 billion Got a GCSE exam okay on most stuff except this, I just can't seem to...

Global Warming The increasing amount of Carbon Dioxide and Methane trap more heat than 'clean' air. This makes the Earth warmer. What happens is the Infra Red radiation from the sun has a short wavelength so it can pass through the Earths atmosphere. With me? Because the Earth isn't as hot as...