Which processes produces carbon dioxide from carbon containing compounds?

Which process removes carbon dioxide from the atmosphere?

What is the greenhouse effect?

What are some of the consequences of global warming?

What is ammonification and which organisms carry it out?

What is nitrification and when does it occur?

What is nitrogen fixation, and which two types of micro-bacteria carry it out?

What is denitrification?

Why are fertilisers needed?

Distinguish between the two types of fertilisers:

How do fertilisers increase productivity?

What are the positive effects of nitrogen based fertilisers?

What are the detrimental effects of nitrogen bases fertilisers?

What is leaching and what does it cause?

Explain how eurotrophication can kill fish - mainly in fresh water