Suggest two reasons why irrigation is important for human development of the desert (4 marks)

What is the name of the ocean current that affects the british isles? how does it influence their climate?

There is only one climate type in motion across the world at a time

Simple astronomical telescope the objective lens has a focal length of 75 cm and that of a piece of 5cm of the lenses are 18 cm apart when will be final image of a distant object before