The fact of being environmentally or ecologically conscious; commitment to environmental conservation.
Inexperience.
The state or quality of being green; green colour.
The second decade of a century: the 1910s, 2010s, etc. The oneties, the tens.
The numbers between thirteen and nineteen.
The range between 10 and 19.
The time of life between thirteen and nineteen years old; the teenage years.