Adolescence /ˌæd

atmosphere /ˈæt.mə.sfɪə r / /-sfɪr/ noun AIR
1. the atmosphere
[ S ] the mixture of gases around the Earth
These factories are releasing toxic gases into the atmosphere.
2. [ S ] the air that you breathe in a place
The atmosphere in the room was so stuffy I could hardly breathe.
A few plants in an office will improve the atmosphere.
3. [ C ] the mixture of gases that surrounds some planets, such as the Earth; the air
balance /ˈbæl. ə n t  s/ noun EQUAL
1. [ S or U ] a state where things are of equal weight or force; equilibrium
The toddler wobbled and lost his balance (= started to fall sideways) .
She had to hold onto the railings to keep her balance (= to stop herself from falling) .
New tax measures are designed to redress the balance (= make the situation more equal) between rich and poor.
We must strike a balance between reckless spending and penny-pinching (= try to have something between these two things) .
2. [ U ] The balance on a piece of electronic equipment for playing music is the particular mixture of different sounds, or the device which controls this.
3. on balance
after thinking about all the different facts or opinions
I would say that, on balance, it hasn't been a bad year.
biofuel /ˈbaɪ.ə ʊ  ˌfjuː.əl/ /-oʊˈ-/ noun [ C or U ]
a fuel that is made from living things or their waste