- Ecosystems: concept, components. The Ecosphere.
- Ecological factors; conditions and resources. Limiting factors. Tolerance curves. Ecological niche. Habitat.
- Ecological factors in land ecosystems.
- Ecological factors in aquatic ecosystems.
- Ecological succession.
- Biotic interactions: intraspecific and interspecific interactions.
- Population growth. Positive and negative feedback in the interspecific interactions. Plagues and their control.
- Feeding interactions: flow of energy and matter in the ecosystems; producers, consumers and decomposers; food chains and food webs; trophic pyramids.
- Biogeochemical cycles.
- Atmospheric pollution: the greenhouse effect and the global warming; the slimming of the ozone layer; acid precipitations.
- Water consumption: water treatment and sewage treatment.
- Water pollution: fertilisers, industrial pollutants, thermal pollution.
- Other major human influences in the ecosystems.
BBC guide to Climate Change: lots of resources that include reviews, analysis, news and more.
Learn what global warming is, what causes it, what its current effects are and what the future effects could be.
Google Earth file showing how climate change and global temperature rises could affect our world over the next 100 years.
What happened to global warming?
This title may come as a bit of a surprise, so too might the fact that the warmest year recorded globally was not in 2008 or 2007, but in 1998. But it is true.
Climate scepticism: the top 10.
What are some of the reasons why "climate sceptics" dispute the evidence that human activities are bringing potentially dangerous changes to the Earth's climate, ant their counter-arguments?
Where you can check on the latest status of the ozone layer over the South Pole.
Follow a drop of water from the source through the treatment process.
Black tides: the worst oil spills in history.
Google Earth file showing information about the 50 worst oil spills, from tanker accidents and drilling operations, as well as a number of other notable spills.
Global Warming
Global Warming is a hot topic. This video looks at the evidence and focuses on these two questions: "is the Earth getting warmer?" and "what are the effects of Carbon Dioxide in the atmosphere?"
The truth about global warming
A simple and effective way to see how human activity relates to global warming.
Climate Change 2013: The Physical Science Basis
The IPCC has produced a video on its Fifth Assessment Report (AR5). The first part on the Working Group I contribution to AR5 is now available.
Ask for a better world
Global warming: when you feel it, it's already too late.
Teens, frogs and climate change
With frogs and other amphibians already dying in large numbers, a group of teenagers is joining other amateur scientists to gather information on the problem.
Early birds and springtime
A growing body of evidence shows that birds are nesting earlier due to global warming, with potentially harmful consequences.
Coal combustion and acid rain
Watch how sulphur-rich coal is a major source of acid rain and what can be done to mitigate its damage.
Analysing acid rain
Visit this research station in the Black Forest, Germany, to watch rainwater being tested for acidity.
The flow of the Sun's radiation across the Earth (I)
The flow of the Sun's radiation across the Earth (II)
Variation of temperatures in the last 130 years
Variation of temperatures and CO2 concentrations in the last 130 years
Records of monthly temperatures in the last 130 years
Variation of temperatures between 1979 and 2008
Main sources of CO2 emissions
Annual greenhouse gas emissions by sector
Seasonal melting of the Greenland ice sheet
Measures to cool down the Earth
