Environmental Science
Biogas is composed of

methane, carbon dioxide, nitrogen and hydrogen
carbon dioxide, nitrogen and hydrogen
methane, carbon dioxide, nitrogen and sulphur
ethane, carbon dioxide, nitrogen and hydrogen

ANSWER DOWNLOAD EXAMIANS APP

Environmental Science
Our seasons are caused by:

The angle at which sunlight reaches the earth
The changing distance between the earth and the sun
Only (b) and (c) are correct
All of these
The length of the daylight hours

ANSWER DOWNLOAD EXAMIANS APP