It's the winter solstice today (in the Northern Hemisphere) and from now on until midsummer the days will gradually get longer and brighter. The winter solstice has long been celebrated by those whose lives are dictated by the seasons and who feel a connection to nature. It's associated with rebirth and fresh chances.
The University of Southampton offer a wide range of free to enter writing competitions with a green theme. The current ones (scroll down to find them) include those for scriptwriting, flash fiction and a novel. Prizes average £500.
I'd planned to provide a daily free to enter writing competition from 8th December up until today – but you know what plans are ... I'm keeping going until Christmas Eve.